png 30 30 hw1lineg.png

xyrgb 15   15    255   0   0
xyrgb  0   15      0 255   0
xyrgb 15    0      0   0 255
xyrgb 29   20.6  255   0 255
xyrgb 20.3 29      0   0   0

lineg 1 2
lineg 1 3
lineg 1 4
lineg 1 5
lineg 2 3
lineg 2 4
lineg 2 5
lineg 3 4
lineg 3 5
lineg 4 5