Stand in a staggered stance with one foot in front and your chest tall. Bring your fists up by your chin and your elbows against your ribs.
If your left foot is in front, extend your left arm into a jab punch, rotating your fist to turn your knuckles so the top of your hand faces up (extend your right arm if your right foot is in front). Lean into your front leg as you punch.
Bring your hand back to your face, and do the same pattern with your other hand into a cross punch, twisting at your torso and pivoting on your back foot.
Bending your knees and keeping your chest lifted, lower down as though you're ducking under something (this isn't quite a squat).