from visual import *
scene.autoscale = 0

# The parameter a in the logistic map - vary this to
# see different behaviors.
a = 2.5

# create two cones (assigned to conea and coneb) that point
# "up" on the screen (positive y - by setting axis)
# and have narrow bases, slightly separated in position, pointed
# oppositely (base to base)
conea = cone(radius=0.1, color=color.green, x=0.25, axis=(0,1,0))
coneb = cone(radius=0.1, color=color.red, x=0.26, axis=(0,-1,0))

# repeatedly apply reflection map, 3 times a second, until program
# stopped. Pause for 5 seconds to allow user to zoom in.
for i in range(20):
    rate(4)

## The while loop repeats the map on the two cones forever,
## 5 times a second. (It can help to increase rate.)
while 1:
    rate(5)
    conea.x = a * conea.x * (1. - conea.x)
    coneb.x = a * coneb.x * (1. - coneb.x)