作業五

size 200 200
paper 100

//righrup
repeat x 200 0
{
pen 40 (*20)
line 150 150 100 x
line 150 150 100 x
}

//leftdown
repeat x 200 0
{
pen 70 (*20)
line 50 50 100 x
line 50 50 100 x

}
//rightdown
repeat x 200 0
{
pen 20 (*20)
line 150 50 100 x
line 150 50 100 x

}

repeat x 200 0
{
pen 90 (*20)
line 50 150 100 x
line 50 150 100 x

}