// This program produces the graph which
// becomes the cover of my book.
// Buy it on Amazon for Kindle

graph width=7.5, height=7.5*8/6 
graph vscale=.35, voffset=1.7

plot color=(255,0,0)
for angle=0 to 4*pi+.1 step pi/20
  plot x=angle, y=sin(angle)
next

plot color=(0,255,0)
for angle=0 to 4*pi+.1 step pi/20
  plot x=angle, y=cos(angle)
next

plot color=(0,0,255)
for angle=0 to 4*pi+.1 step pi/20
  plot x=angle, y=sin(-angle)
next

title$ = "You Can Program\nYour Own\nComputer"
text string=title$,v=87,h=49,size=58
by$="by"
text string=by$,v=15,h=65,size=25
mark$="Mark C. Hendricks, Ph.D."
text string=mark$,v=8,h=70,size=30