heres a copy of an sample program code needs to be fixed, think of it lighting 3 led's in binary sequence

Code:
PORTB.0 = INT ' Just a INT Code Placeholder
X VAR Byte : X = 0

MyLOOP:
PORTB.1-3 = X ' Shifting Code Needed
pause 1000
X = X + 1
if X > 7 then X = 0
Goto MyLoop