  We describe a simple algorithm that calculates the distributions of electrons
and positrons under multiphoton beamstrahlung at a future linear collider. The
evolution equation as given by Chen is solved by a Monte Carlo algorithm.
Explicit multiple beamstrahlung photons are generated. We present first results
from an implementation of beamstrahlung into the Monte Carlo event generator
{\tt WOPPER}, that calculates the QED radiative corrections to the process
$e^+e^- \to 4$~fermions through resonating W pairs.
