# Damped_Oscillator
# phi'' = -(S*phi + D/m*phi')

coefficient.1(-1) -> -phi0   # Initial Amplitude
coefficient.3     -> S     # SpringForce
coefficient.4     -> D/m   # Damping linear to speed

iintegrate phi'' -> -phi'
invert -phi' -> phi'
cmultiply phi', D/m -> D/m*phi'

iintegrate -phi' -> phi
  IC: -phi0
cmultiply S, phi -> S*phi

isum 10:S*phi, D/m*phi' -> -(Sphi+D/mphi')
assign -(Sphi+D/mphi') -> phi''

output(y) -> out.y