Step 1: Materials:

-pen (any color)
-baby powder (any powder)
-hairspray (any)
-paper towel / makeup sponge
- anything to cleanse area (witch hazel, alcohol pads, soap and water etc.)

Step 2: Cleanse Area

Clean the area using paper towel or makeup sponge.

Step 3: Draw

Draw your design. If you mess up you can use water ( soap is optional) on a makeup sponge or paper towel to get it off.
When done drawing let it dry for a few minutes.

Step 4: Apply Powder

Put powder on the area where you drew your design after it is dry.

Step 5: Spray

Spray a good amount of hairspray.

Step 6: Dry Up the Excess Hairspray

Use your makeup sponge or paper towel and dab/pat the design and around it. And let it dry and then enjoy!

Btw: DO NOT DO THIS IF U R GOING TO THE BEACH OR POOL OR STUFF LIKE THAT,IT WILL WASH RIGHT OFF. WHAT YOU CAN DO IS PUT A LITTLE BIT OF GLUE ( PREFERABLY ELMERS GLUE ON IT FOR IT TO STAY ON A LITTLE BIT LONGER.