trianglesquarecircle 

This could not be made in Turtlestitch.

Instead it is coded in Snap! using four sprites, one of which is the needle and the others draw step-by-step a triangle, square and circle. The needle stitches from the postions taken by the three other sprites as they draw their shapes.

See: https://snap.berkeley.edu/snapsource/snap.html#present:Username=rmillwood&ProjectName=trianglesquarecircle

The program is exported from Snap! and then imported into Turtlestitch, where all four sprites continue to function, but cannot be edited except for the first.