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I am writing a program that prints a small menu to a text LCD. I am using two buttons, one to switch between the two menu items and then the other selects the menu item. When I select a menu item and activate it, I want to turn one of the LEDs on (one LED for each menu item). If I again activate the menu item, it will turn off the LED. My problem is I want the LED to blink (on for .5 seconds and .5 off). How do I blink the LED's without interrupting the LCD menu function while using wait()?