pc logo里的摩天轮怎样话

TO GG
SETPC 12
REPEAT 9 [PU FD 70 PD (STAMPOVAL 10 10 "TRUE) RT 80 FD 50 BK 50 LT 80 PU BK 50 RT 40 PD]
PU RT 90 FD 25 LT 90 FD 5 PD
END

TO I :A
GG CS RT :A
PU RT 90 BK 25 LT 90 BK 5 PD
I :A + 5
END
执行I 5

TO GT
SETW 2 SETPC 12 FD 50
(STAMPOVAL 8 8 "TRUE)
END

TO LZ
REPEAT 9 [GT RT 360 / 9]
END

TO MTL
LT 90 PU FD 70 RT 90 PD BK 25
LZ FD 25 RT 90 PU FD 70 LT 90
PD WAIT 3 CLEAN RT 3
MTL
END
执行：mtl
绝对正确！别修改！

什么东西？？？

TO MTL
REPEAT 9[PU FD 100 PD (STAMPOVAL 9 9 “TRUE) RT 110 FD 60 BK 60
LT 110 PU BK 100 PD RT 360/9] (注释：这里程序测试不能分行)
END
TO MTLDH
HT SETPC RANDOM 15 (注释：应用随机就可以做出颜色变化)
MTL
WAIT 10
RT 20
CLEAN
MTLDH
END