abacus = [0, 0, 0, 0]
print(abacus)
m(abacus, 2)
print(abacus)
m(abacus, 4)
print(abacus)
m(abacus, 3)
print(abacus)
m(abacus, 3)
print(abacus)
m(abacus, 7)
print(abacus)
python list controlled increment