Strafing? Hmm, I have no idea how to do that one. But I guess it's like moving the camera in a 1st-person shooter, right???
Now i'm not exactly that great at coding, but i'm will willing to help.
See if this works.
if leftkey()=1 then yrotate object (object number),cy#-90 : move object 0.2 : yrotate object 0,(object number)
if rightkey()=1 then yrotate object 0,(object number)+90 : move object 0.2 : yrotate object 0,(object number)
The object number represents what the object number is for the sphere that the player is going to control.
Good Luck.
"Talking(typing) in computer language is like talking to a human. You must talk(type) clearly.