Dr.Scheme: What I learned

I learned how to draw on the computer. I already knew how to draw but this program was more difficult. You had to do math in order to find the perimeter of your shape and where to put it.

(start 640 480)

(draw-solid-rect (make-posn 260 140) 120 80 'blue)

(draw-solid-line (make-posn 260 140) (make-posn 320 100 ) 'red)

(draw-solid-line (make-posn 380 140) (make-posn 320 100 ) 'red)

(draw-solid-rect (make-posn 300 200)20 20'green)

(draw-solid-disk (make-posn 304 213) 3 'black)

(draw-solid-disk (make-posn 180 80) 40 'green)

(draw-solid-disk (make-posn 150 72) 5 'blue)

(draw-solid-disk (make-posn 200 72) 5 'blue)

(draw-solid-line (make-posn 145 95) (make-posn 190 95) 'yellow)

(draw-solid-rect (make-posn 80 120) 80 80 'black)

(draw-solid-line (make-posn 100 100) (make-posn 120 120) 'red)

(draw-solid-line (make-posn 140 100) (make-posn 120 120) 'red)

(draw-solid-disk (make-posn 100 190) 5 'green)

(draw-solid-disk (make-posn 145 190) 5 'green)