When you put a loop inside of another loop,
we call that a nested loop. For example, here

we're given the code already to draw one triangle
with sides of length 100 pixels using the

repeat times block set to three, once for
each side of a triangle. But we want to draw

six triangles. In order to do that, we're
going to take that loop and place it inside

of another repeat times block. Pretty cool!