\begin{verbatim}
col(1)=data(300,800,10)
gauss(x,c)=exp(-(x-c)^2/10000)
geel(x)=gauss(x,600)
groen(x)=gauss(x,500)
blauw(x)=gauss(x,400)
col(2)=geel(col(1))
col(3)=groen(col(1))
col(4)=blauw(col(1))
col(5)=col(2)+col(3)
col(6)=col(2)+col(4)
\end{verbatim}