This oscillating system (with negative a) is exitated at t = 0
near its center. This region synchronizes all the rest oscillators making a
pacemaker.
a
b
ε
Δt
Δx
D
delay
Ymin
Ymax
it
fps
This script uses simple explicit algorithm.
It makes it time steps Δt per frame.
Heart rhythmsupdated 24 Dec 2011