You have to use commands in order to make your shape.
If you want to make a square big as 90 degrees, you can make it easier so it wouldn't be to much work you just write inside edall : repeat 4[fd 90 rt 90]. fd-foward, rt-rigth and after you write end and click file save exit and when you are going to get out click flie save
If you want to make a triangle you write : rt 270 repeat 3 [fd 90 rt 120] and then you put it in edall