title: How to create walls and up/down/right/left code for maze
body: <p>I created a border of black patches and the rest of the "walls" of the maze are purple.  How would I code the maze so that it won't walk into the walls?  And also how would you code the up/down/left/right buttons to control the turtle that walks through the maze.  Thanks so much! I tried so much but I can't seem to get it to work.</p>