(For my drawings i prefer Stabilo markers.)
This is the Rainbow Heart and has a slight illusion that makes it look shiny even though it is not.
Step 1: Using a pencil, lightly sketch out a heart and put a glare on the top left side. ( A heart glare is just like a balloon glare.)
Step 2: Get a dark red color and draw a curved line from the top middle to the bottom middle.
Step 3: (optional) With the same dark red, make some shading under the glare.
Step 4: Get a red color and once again start from the top middle and this time make it get closer and closer to the left border with a simialar curve to step one. Once the line touches the border of the heart, stop it.
Step 5: Do a simialar pattern with orange, yellow, light green, green and blue-green. (Which blue-green should be a very weird circlish shape from the curve.) You can add more or less colors depending on the size you do this.
Step 6: Fill in the areas with the correct colors.
Step 7: (optional) Using a good eraser, erase the pencil borders.
You can post some that you drew!