Hey Clash!! I'm Playing!!!
LinkIt (or Arduino), servo, pen touch screen and jumper.
How Do I Do It?
Video to understand. Follow me on youtube!
It's easy, You must copy the sketch and attach the pen to the servo as in the video.
Remember, jumper is connected to the pen!
The end, now you have a robotic finger... For example: You can use this to play with Clash of Clan