Article in English: Choose an open area where you'll have plenty of space to move. You will want to practice on a soft surface, such as in a carpeted room, outside on the grass, or in a dance studio with mats. The tips of your toes should be pressed firmly into the ground when you lie down. Don't point your toes; keep your feet flexed at the ankles so you're toes naturally point into the ground. Wear sneakers while doing the worm so your toes have more support while pushing off and landing during the moves. Bend your elbows and put your hands under your shoulders into a push-up position. You will be using your hands to push up the top half of your body later, so be sure they're in a good, comfortable position on the ground under your shoulders. This is where the momentum of the worm comes from, so you'll want to kick your legs as hard as you can. Using your toes to push off the ground, bend your knees as you kick your legs up and toward the sky. Try to get your feet above the middle of your back.  Keep your legs together and push off with both feet at once. Keep them completely together from your feet to your thighs throughout the entire dance move. The goal is to get all of your legs off the ground, not just the part below your knees. Try to get your upper thighs and hips off the ground as you rock forward.

Summary in Indonesian:
Berbaringlah menelungkup di area yang permukaannya empuk. Tekuk jari kaki ke atas. Letakkan kedua telapak tangan di lantai tepat di bawah bahu. Lontarkan kedua kaki ke atas sambil bertumpu pada kedua telapak tangan.