ArtLogo is an app that lets you create images. It has a Turtle that follows a sequence of commands written in Logo programming language. The Logo commands can tell the turtle to draw lines and arcs, draw in different colors, go to a specific place on the screen, etc. There are also commands that let you repeat or name sequences. Logo can also perform arithmetic operations.
ArtLogo is version of the Logo programming language that was designed to be easy enough for children and yet powerful enough for people of all ages. ArtLogo focuses on making images while allowing you to also explore geometry and programming.