#!/usr/bin/env python
from os import system 

h=256
w=256
pfile=open('colors.ppm','w')
blue=int(raw_input("Enter blue value between 0 and 255==>"))
print "You entered blue=",blue
print "Now making image"

#print header
pfile.write("P3\n") #use P3 for ascii, P6 for binary
pfile.write("%d %d\n" % (w, h)) 
pfile.write("255\n")

#print raster
for j in range(0,w): #in python, the range stops at w-1
	for i in range(0,h):
		red=i
		green=j
		pfile.write("%d %d %d\n" % (red,green,blue)) #use with P3
#		pfile.write("%c%c%c" % (red,green,blue))#use with P6
pfile.close()
print "file colors.ppm was written"

#display the image 
print "now trying to display image to your monitor (please wait)"
system("display colors.ppm") #the import statement at top was needed for this