My crappy pseudo random number generator.py

def XOR(N1, N2):
    if len(N1)==len(N2):
        N3=range(len(N1))
        for i in range(len(N1)):
            if N1[i]==N2[i]:
                N3[i]=0
            else:
                N3[i]=1
        return N3
    else:
        return none

def IND(I):
    if I==[1,1,1,1]:
        I=[0,0,0,0]
    for i in range(4):
        if I[i]+1>=2:
            I[i]=0
        else:
            return I

def R1(R,T,Z):
    RR=XOR(R,T)
    return XOR(XOR(Z,IND(R)),R)


R=[0,1,0,1]
T=[0,0,0,0]
Z=[int(raw_input("Z1:\n")),int(raw_input("Z2:\n")),int(raw_input("Z3:\n")),int(raw_input("Z4:\n"))]
TMAX=int(raw_input("LEN:\n"))
print R
for i in range(TMAX):
    R=R1(R,T,Z)
    print R
    T=IND(T)