I've wired the circuit exactly as it's shown in the diagram (well, I can't see any errors), however only my green and red LED's flash. Any ideas why my orange LED isn't coming on? I've tried swapping LED's and there's definitely not a problem with the orange LED. I've also tried putting a 100k resistor between 2 and 4 on the 2nd 555 as mentioned above, but that didn't do anything.
Any help would be much appreciated.