Ages 9–14 · Grades 4–8 · Computer Science

DoodleForge

A pen goes forward, turns, and a loop repeats it — and out comes a square, a star, a spiral, a flower. The number of repeats is the number of sides; the turn is the corner; a length that grows makes a spiral. Read the little program, predict the picture it draws, then watch the pen make it.

Every picture here is drawn by really running the code — nothing is a stock image. Runs on your device; nothing leaves it.

Like