Code
c1=rectangle(h=200,w=200,fill="black")|repeat(10,rotate(10))
c2=rectangle(h=190,w=190,fill="#da0b0b",stroke="none")|rotate(5)|repeat(10,rotate(10))
c3=rectangle(h=180,w=180,fill="red",stroke="none")|rotate(10)|repeat(10,rotate(10))
c4=rectangle(h=170,w=170,fill="#ff6600",stroke="none")|rotate(15)|repeat(10,rotate(10))
c5=rectangle(h=160,w=160,fill="#e6b800",stroke="none")|rotate(20)|repeat(10,rotate(10))
c6=rectangle(h=150,w=150,fill="#ffff00",stroke="none")|rotate(25)|repeat(10,rotate(10))
c7=rectangle(h=140,w=140,fill="#ffff99",stroke="none")|rotate(30)|repeat(10,rotate(10))
c8=rectangle(h=130,w=130,fill="#b3b3ff",stroke="none")|rotate(35)|repeat(10,rotate(10))
c9=rectangle(h=120,w=120,fill="#8080ff",stroke="none")|rotate(40)|repeat(10,rotate(10))
c10=rectangle(h=110,w=110,fill="#4d4dff",stroke="none")|rotate(45)|repeat(10,rotate(10))
c11=rectangle(h=100,w=100,fill="#0000b3",stroke="none")|rotate(50)|repeat(10,rotate(10))
c12=rectangle(h=90,w=90,fill="#000080",stroke="none")|rotate(55)|repeat(10,rotate(10))
c13=rectangle(h=80,w=80,fill="#000033",stroke="none")|rotate(60)|repeat(10,rotate(10))
c14=rectangle(h=70,w=70,fill="black",stroke="none")|rotate(65)|repeat(10,rotate(10))
c15=rectangle(h=60,w=60,fill="#da0b0b",stroke="none")|rotate(70)|repeat(10,rotate(10))
c16=rectangle(h=50,w=50,fill="red",stroke="none")|rotate(75)|repeat(10,rotate(10))
c17=rectangle(h=40,w=40,fill="#ff6600",stroke="none")|rotate(80)|repeat(10,rotate(10))
c18=rectangle(h=30,w=30,fill="#e6b800",stroke="none")|rotate(85)|repeat(10,rotate(10))
c19=rectangle(h=20,w=20,fill="ffff00",stroke="none")|rotate(90)|repeat(10,rotate(10))
c20=rectangle(h=10,w=10,fill="white",stroke="none")|rotate(95)|repeat(10,rotate(10))
show(c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,c15,c16,c17,c18,c19,c20)
