You can't go wrong working the 1-2 along with footwork on the heavy bag. Not sure what you mean by tape, though.
Ah. It's just a simple tool for beginner boxers like me. You set the tape in front of the bag so that when your lead foot is over, you're in range for a 1-2, and when you're lead foot is behind the tape, you're out of distance. Just a learning tool for jumping in and out of someone's range.