Make an image flicker in a short time (2-3seconds) (not use timer)
Please help me if you have experience of it:
Have anyway to do this: -->
When the user presses left arrow on the remote control, the green arrow on the screen should change to a white arrow for a brief second (like it was pressed), then becomes green again. The arrows on the screen never has the focus. I don't want to use timer to do this.