# For each "variable = ", there must be a right hand side: 
# either an empty string or a python-style logical expression 
# involving variable names, "or", "and", "(", ")". 
# The order of equations matters! 
# 
# modelType = hill
# invTimeStep = 0.1
#
# boolean update rules:
0 = 0 and not 1
1 = 1 and not 0
# coupling list:
0          0             1.0
0          1            -1.0
1          1             1.0 
1          0            -1.0 