Check out version 2! http://scratch.mit.edu/projects/superdude93/2251055 I was supposed to make an educational project for school, so here you go. It makes diagonals in a polygon (no, really?). Here's the formula for the number of diagonals in a polygon where s is the number of sides: (s(s-3))/2 This is a new verson that works online. Please press love it for a 3-20 sided polygon.