'Draw filled circle with
'LINE statements
10 x=80:y=60:u=45:'Radius
20 cls:v=0:w=0
30 at x-u,y-v:line u+u,0
40 at x-u,y+v:line u+u,0
50 w=w+v+v+1:v=v+1
60 if w<0 goto 30
70 w=w-u-u+1:u=u-1
80 if u>0 goto 60