CIRCLE_1.BAS

screen 12
window (0,0)-(300,300)
circle (290,160),200,1
circle (290,160),190,2
circle (290,160),180,3
circle (290,160),170,4
circle (290,160),160,5
circle (290,160),150,6
circle (290,160),140,7
circle (290,160),130,8
circle (290,160),120,9
circle (290,160),110,10
circle (290,160),100,11
circle (290,160),90,12
circle (290,160),80,13
circle (290,160),70,14
circle (290,160),60,15