-void flash_led(unsigned int times, unsigned int brightness_divisor, unsigned int delay_divisor, unsigned int led_selector)
+// id: id of LED to flash (0,1)
+// times: # of times the LED should flash
+// brightness_divisor: 1: full brightness, 2: half brightness, ...
+// delay_divisor: 1: slow... 8: fastest
+// phase_divisor: 0.. same phase; 2.. pi/2 phase, 4.. pi phase, 6.. 3pi/2 phase
+void flash_led(unsigned int id, unsigned int times, unsigned int brightness_divisor, unsigned int delay_divisor, unsigned int phase_divisor)