Follow your usual routine for washing your hair. Add conditioner and rinse it out. Use a towel to dry your hair so that it is just damp. Use foam mousse, styling cream or texturizer to your hair. Make sure it’s spread throughout your hair. Focus on the mid-length to the ends of your hair. If you have pretty short hair, don’t use hair product on your roots. This can make your hair look stringy. Each chunk of hair will be about 1 to 2 inches (2.5 to 5.1 cm) wide. It might help to pin up some of the hair around the crown of your head so you can work with the hair underneath. The bigger the sections, the wavier your hair will be. If you have very small sections of hair, your hair will end up more as curls. Go to sleep in your pinned-up hair. If you’ve secured the bobby pins flat against your head, then you shouldn’t get poked by any of them in your sleep.

TL;DR in Indonesian:
Persiapkanlah rambut. Gunakanlah produk untuk rambut. Bagilah rambut hingga menjadi 10-15 bagian. Biarkan rambut kering semalaman.