Dynamic modelling script, example

binding
 MapA=a.map;    # input map
 MapC=c.map;    # output map

areamap
 mask.map;

timer
 1 10 1;

initial
 MapB=5*MapA;             # MapB becomes 50
 report MapC=MapB/10;     # MapC becomes 5

dynamic
 MapB=MapB+MapC;
 MapD=MapB+1;