You first need a cheap pair of white converse like shoes.
The materials you will need for this project are:
Cheap white converse shoes
Sharpie pens (dark green, lightgreen, black and pink!, if you can't find a pink light enough just buy a fabric pen.

You then need your pink fabric pen to start on the tongue of the shoe, ddon't worry if you see white marks you can go over this once its dryed.

Then you have to do the same to the other shoe so that the tongue is completly convered in pink!

Next make the marks of the watermellon it helps to make them in pencil and then go over them in dark green

Then you colour your marks in dark green and the gaps in light green do the same on both sides of both shoes

Finally after all the work your shoes are nearly finished just to finish them what i did was add seed shapes around the tongue area to make it look like a watermellon
Now your shoes are finished enjoy!! :P