readme update

README.md

@@ -4,4 +4,12 @@ In `cuda-test.cu`, we write a simple kernel (following one [lecture](https://www
 
 In `colab-notebook.ipynb`, we discuss our full journey of CUDA with Colab, from basic experimentation, to installing `nvcc4jupyter`, to solving Problem 1 and Problem 2 of the CS344 problem sets. We encourage feedback for further experimentation.
 
-To play directly on Colab, create a copy upon clicking: [https://colab.research.google.com/drive/1ujEKAeK71D7-Jzf-FHvpz1B5lOcX3F7S?usp=sharing](https://colab.research.google.com/drive/1ujEKAeK71D7-Jzf-FHvpz1B5lOcX3F7S?usp=sharing)
+To play directly on Colab, create a copy upon clicking: [https://colab.research.google.com/drive/1ujEKAeK71D7-Jzf-FHvpz1B5lOcX3F7S?usp=sharing](https://colab.research.google.com/drive/1ujEKAeK71D7-Jzf-FHvpz1B5lOcX3F7S?usp=sharing)
+
+<img src="https://drive.google.com/uc?export=view&id=1lLxx9JxLuMZqrKufokpC17HTWRhJFH5I" width="500px">
+
+Conversion to greyscale:
+<img src="https://drive.google.com/uc?export=view&id=1X_VABMZxBYLyrOmhPGOIuRVFMOZ9xifx" width="500px">
+
+Gaussian blurring:
+<img src="https://drive.google.com/uc?export=view&id=13Vy9seUNQU5Gzv1YDWIYm_s1a6_1bBop" width="500px">