Check Temperature using Interrupt (ATmega8)

I want to get a codes based on ATmega8. and it has default while loop to keep checking temperature when the temperature range is between 0 to 10℃, Blue LED is turned ON. when the temperature range is between 10 to 40℃, Green LED is turned ON. when the temperature range is over 40℃, Red LED is turned ON. when i send '1' char value via BlueTerm App, keep checking temperature duty is being stopped meanwhile. It means Interrupt. and White LED is turned ON. When i send '2' char value, RED LED is turned ON. When i send '3' char value, Green When i send '4' char value, Blue When i send '5' char value, Sequence (White → Red → Green → Blue → and White again) When i send '6' char value, Fade-In slowly, (W → G → R → B) When i send '7' char value, All LEDs are OFF, and then Back to Temperature check Mode.