diff --git a/Decoration.lua b/Decoration.lua
new file mode 100644
index 0000000..0bc5dcc
--- /dev/null
+++ b/Decoration.lua
@@ -0,0 +1,382 @@
+local DecorationData = {}
+local sprite = app.sprite
+local spr = app.activeSprite
+local path, title = spr.filename:match("^(.+[/\\])(.-).([^.]*)$")
+local defaultExpression = {
+    character = { "neutral", "happy", "barely", "missed" },
+    sprite = { "neutral" }
+}
+local lang = {
+    ["角色"] = "character",
+    ["精灵"] = "sprite"
+}
+
+local showCompletedExpression = {
+    ["character"] = function()
+        return table.concat(defaultExpression.character, ", ")
+    end,
+    ["sprite"] = function()
+        return table.concat(defaultExpression.sprite, ", ")
+    end
+}
+
+-- encode
+local switch = {
+    ["number"] = function(data)
+        return data
+    end,
+    ["boolean"] = function(data)
+        return data
+    end,
+    ["table"] = function(data)
+        return '[' .. table.concat(data, ",") .. ']'
+    end,
+    ["string"] = function(data)
+        return '"' .. data .. '"'
+    end
+}
+
+function JsonToString(data, maxLengthData)
+    local Output = '{'
+    local char = ''
+    local propertyOrder = { "name", "loop", "fps", "loopStart", "portraitOffset", "portraitSize", "portraitScale",
+        "frames" }
+    local tos = function(key, value)
+        local out = '"' .. key .. '": ' .. switch[type(value)](value)
+        return out
+    end
+    for i = 1, #propertyOrder - 1 do
+        Output = Output ..
+            tos(propertyOrder[i], data[propertyOrder[i]]) .. ', '
+        for j = 1, maxLengthData[propertyOrder[i]] - #tostring(switch[type(data[propertyOrder[i]])](data[propertyOrder[i]])) do
+            Output = Output .. ' '
+        end
+    end
+    Output = Output ..
+        tos(propertyOrder[#propertyOrder], data[propertyOrder[#propertyOrder]])
+    return Output .. '}'
+end
+
+for _, tag in ipairs(spr.tags) do
+    for i = 1, #defaultExpression.character do
+        if defaultExpression.character[i] == tag.name then
+            table.remove(defaultExpression.character, i)
+        end
+    end
+    for i = 1, #defaultExpression.sprite do
+        if defaultExpression.sprite[i] == tag.name then
+            table.remove(defaultExpression.sprite, i)
+        end
+    end
+end
+
+local renewFrameSetWidget = function()
+    headerData
+        :modify { id = "frameTitle", visible = headerData.data.showPic }
+        :modify { id = "index", visible = headerData.data.showPic }
+    --:modify { id = "preview", visible = headerData.data.showPic }
+        :modify { id = "frameOffsetTitle", visible = headerData.data.showPic }
+        :modify { id = "rowPreviewOffsetX", visible = headerData.data.showPic }
+        :modify { id = "rowPreviewOffsetY", visible = headerData.data.showPic }
+end
+
+
+local averageFps = 0
+for _, frame in ipairs(sprite.frames) do
+    averageFps = averageFps + frame.duration
+end
+averageFps = averageFps * 1000 / #sprite.frames
+print(tostring(100))
+
+
+headerData = Dialog {
+        title = "精灵图导出选项",
+        notitlebar = false,
+        onclose = nil
+    }
+    :check {
+        id = "showPic",
+        label = "",
+        text = "以特定帧作为预览",
+        selected = false,
+        onclick = renewFrameSetWidget
+    }
+    :separator {
+        id = "frameTitle",
+        visible = false,
+        text = "预览帧"
+    }
+    :slider { id = "index",
+        label = "帧序列号",
+        min = 1,
+        max = #sprite.frames,
+        visible = false,
+        value = 1,
+        onchange = nil,
+        onrelease = nil }
+    -- :canvas {
+    --     id = "preview",
+    --     width = sprite.width,
+    --     height = sprite.height,
+    --     visible = false,
+    --     onpaint = function(ev)
+    --         local gc = ev.context
+    --         local img = Image(sprite.width, sprite.height)
+    --         for i, layer in ipairs(sprite.layers) do
+    --             if not layer then
+    --                 img:drawImage(layer:cel(20).image, 0, 0)
+    --             end
+    --         end
+    --         gc:drawImage(img, 0, 0)
+    --     end
+    -- }
+    :separator {
+        id = "frameOffsetTitle",
+        visible = false,
+        text = "预览帧偏移"
+    }
+    :number {
+        id = "rowPreviewOffsetX",
+        text = "0",
+        visible = false,
+        decimals = integer,
+        onchange = nil
+    }
+    :number {
+        id = "rowPreviewOffsetY",
+        text = "0",
+        visible = false,
+        decimals = integer,
+        onchange = nil
+    }
+    :separator {
+        text = "动画与帧率"
+    }
+    :combobox {
+        id = "loopOption",
+        label = "循环设置",
+        option = "按节拍循环",
+        options = { "按节拍循环", "始终循环(不依赖节拍)", "不循环" },
+        onchange = nil
+    }
+    :combobox {
+        id = "loopDirection",
+        label = "循环方向",
+        option = "遵循 aseprite",
+        options = { "正向", "逆向", "正向，来回", "逆向，来回", "遵循 aseprite" },
+        onchange = nil
+    }
+    :combobox {
+        id = "fpsMethod",
+        label = "帧率设置",
+        option = "不设置(0)",
+        options = { "不设置(0)", "通过 aseprite 参数取平均值", "全部更改为" },
+        onchange = function()
+            headerData:modify { id = "fpsSet", visible = headerData.data.fpsMethod == "全部更改为" }
+        end
+    }
+    :number {
+        id = "fpsSet",
+        label = "fps",
+        text = tostring(averageFps),
+        visible = false,
+        decimals = integer,
+        onchange = nil
+    }
+    :label {
+        id = "fpsWarn",
+        visible = false,
+        label = "",
+        text = "精灵图播放时会回到默认表情"
+    }
+    :separator {
+        text = "导出"
+    }
+    :combobox {
+        id = "outputMode",
+        label = "排列方式",
+        option = "打包",
+        options = { "水平条", "垂直条", "打包" },
+        onchange = nil
+    }
+    :combobox {
+        id = "usage",
+        label = "用途",
+        option = "角色",
+        options = { "角色", "精灵" },
+        onchange = function()
+            headerData:modify { id = "spriteWarnContext",
+                text = showCompletedExpression[lang[headerData.data.usage]]() }
+        end
+    }
+    :label {
+        id = "spriteWarnTitle",
+        label = "",
+        text = "自动补充空白表情:\n\r"
+    }
+    :label {
+        id = "spriteWarnContext",
+        label = "",
+        text = showCompletedExpression["character"]()
+    }
+    :separator()
+    :button {
+        id = "ok",
+        text = "确定",
+        focus = true
+    }
+    :button {
+        id = "cancel",
+        text = "取消"
+    }
+
+local function process()
+    --set outputType
+    local outputType
+    if headerData.data.outputMode == "水平条" then
+        outputType = SpriteSheetType.HORIZONTAL
+    elseif headerData.data.outputMode == "垂直条" then
+        outputType = SpriteSheetType.VERTICAL
+    elseif headerData.data.outputMode == "打包" then
+        outputType = SpriteSheetType.PACKED
+    end
+
+    --set headerData
+    local header = '\n\t"size": [' .. sprite.width .. ', ' .. sprite.height .. '],'
+    if headerData.data.showPic then
+        header = header .. '\n\t"rowPreviewFrame": ' .. headerData.data.index - 1 .. ',\n' ..
+            '\t"rowPreviewOffset": [' ..
+            headerData.data.rowPreviewOffsetX .. ', ' .. headerData.data.rowPreviewOffsetY .. '], \n'
+    end
+
+    --default expressions
+    local createDefaultExpression = {}
+    if headerData.data.usage == "角色" then
+        createDefaultExpression = defaultExpression.character
+    else
+        createDefaultExpression = defaultExpression.sprite
+    end
+    for i = 1, #createDefaultExpression do
+        DecorationData[createDefaultExpression[i]] = {
+            name = createDefaultExpression[i],
+            loop = "onBeat",
+            fps = 0,
+            loopStart = 0,
+            portraitOffset = { 25, 25 },
+            portraitSize = { 25, 25 },
+            portraitScale = 2,
+            frames = {}
+        }
+    end
+
+    --add frames
+    for i, tag in ipairs(spr.tags) do
+        local frames = {}
+        local fps = 0
+        if headerData.data.loopDirection == "正向" or
+            (headerData.data.loopDirection == "遵循 aseprite" and tag.aniDir == AniDir.FORWARD) then
+            for j = tag.fromFrame.frameNumber, tag.toFrame.frameNumber do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+        elseif headerData.data.loopDirection == "逆向" or
+            (headerData.data.loopDirection == "遵循 aseprite" and tag.aniDir == AniDir.REVERSE) then
+            for j = tag.toFrame.frameNumber, tag.fromFrame.frameNumber, -1 do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+        elseif headerData.data.loopDirection == "正向，来回" or
+            (headerData.data.loopDirection == "遵循 aseprite" and tag.aniDir == AniDir.PING_PONG) then
+            for j = tag.fromFrame.frameNumber, tag.toFrame.frameNumber - 1 do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+            for j = tag.toFrame.frameNumber, tag.fromFrame.frameNumber + 1, -1 do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+        elseif headerData.data.loopDirection == "逆向，来回" or
+            (headerData.data.loopDirection == "遵循 aseprite" and tag.aniDir == AniDir.PING_PONG_REVERSE) then
+            for j = tag.toFrame.frameNumber, tag.fromFrame.frameNumber + 1, -1 do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+            for j = tag.fromFrame.frameNumber, tag.toFrame.frameNumber - 1 do
+                frames[#frames + 1] = j - 1
+                fps = fps + sprite.frames[j].duration
+            end
+        end
+        if headerData.data.fpsMethod == "不设置(0)" then
+            fps = 0
+        elseif headerData.data.fpsMethod == "通过 aseprite 参数取平均值" then
+            fps = fps * 1000 / #frames
+        elseif headerData.data.fpsMethod == "全部更改为" then
+            fps = headerData.data.fpsSet
+        end
+        DecorationData[tag.name] = {
+            name = tag.name,
+            loop = "onBeat",
+            fps = fps,
+            loopStart = 0,
+            portraitOffset = { 25, 25 },
+            portraitSize = { 25, 25 },
+            portraitScale = 2,
+            frames = frames
+        }
+    end
+
+    --pack into json
+    local OutputJson = ''
+    local maxLength = {
+        name = 0,
+        loop = 0,
+        fps = 0,
+        loopStart = 0,
+        portraitOffset = 0,
+        portraitSize = 0,
+        portraitScale = 0,
+        frames = 0
+    }
+    for _, expression in pairs(DecorationData) do
+        for key, value in pairs(expression) do
+            if maxLength[key] < #tostring(switch[type(value)](value)) then
+                maxLength[key] = #tostring(switch[type(value)](value))
+            end
+        end
+    end
+    local char = ''
+    for _, expression in pairs(DecorationData) do
+        OutputJson = OutputJson .. char .. '\t\t' .. JsonToString(expression, maxLength)
+        char = ',\n'
+    end
+    OutputJson = '{' .. header .. '\t"clips": [\n' .. OutputJson .. '\n\t]\n}'
+
+    --output png file
+    app.command.ExportSpriteSheet {
+        ui = false,
+        type = outputType,
+        textureFilename = path .. '/' .. title .. '.png',
+        ignoreLayer = "outline"
+    }
+
+    --output json file
+    js = io.open(path .. '/' .. title .. '.json', "w")
+    io.output(js)
+    io.write(OutputJson)
+    io.close()
+end
+
+if not spr then
+    return app.alert('请打开一个已有的文件。')
+end
+
+if not path then
+    return app.alert('请保存文件或打开一个已保存的文件。')
+end
+
+renewFrameSetWidget()
+headerData:show()
+
+if headerData.data.ok then
+    process()
+end