A simple example on how to embed Guile Scheme to C using a simple “Tortoise” graphics program
make
./turtle
guile> (tortoise-move 1)
guile> (tortoise-turn 90)
guile> (tortoise-penup)
guile> (tortoise-move 5)
guile> (tortoise-pendown)
guile> (tortoise-move 1)
guile> (tortoise-reset)
If it complains about default terminal just export GNUTERM=x11
or qt