I don't see an ISR for INT0 (Pin 2).
You are also setting the Waveform Generator Mode to 4 (only WGM12 set) which resets the timer to 0 when it reaches the value in OCR1A. You will never reach the value in OCR1B so that interrupt will never occur. You probably want Mode 0 where the timer counts up to FFFF and then re-starts at 0. After you reset the timer the LED should come on about a second later and stay on for 0.92 seconds. The who cycle will then repeat every about every 4.2 seconds.