Guitar Pick Holder (Spring)

I made this Guitar Pick Holder for a good friend of mine you will need :

* 1piece of 7cm long spring (commonly found in old beds & stores that specialize in screws and springs).
u should check that the spring ends are max of (7mm diameter)

* 2pieces of 3-5cm long safety pins. or nails or any long and naarow (max 4mm diameter) thing u can find (:.