def METHOD_NAME():
    base = xtgeo.RegularSurface(ncol=10, nrow=15, xinc=1.0, yinc=1.0, values=0.0)
    surfs = [base]
    # this will get 101 constant maps ranging from 0 til 100
    for inum in range(1, 101):
        tmp = base.copy()
        tmp.values += float(inum)
        surfs.append(tmp)
    return xtgeo.Surfaces(surfs)