/elec/propeller-clock

void setup()

{

	// set up output pins (4 to 13) for the led array

	for( int a = 4; a < 14; a++ )

		pinMode( a, OUTPUT );

	// set up mode-switch button on pin 3

	pinMode( 3, INPUT );

	digitalWrite( 3, HIGH );

	// pink LED on

	digitalWrite( 13, HIGH );

}

// turn an led on/off

void ledOn( int pin, bool on )

{

	// pin 4 needs to be inverted (it's driving a PNP)

	if( pin == 4 ) on = !on;

	digitalWrite( pin, on? HIGH : LOW );

}

void loop()

{

	bool on = digitalRead( 3 )? true : false;

	for( int a = 4; a < 12; a++ )

		ledOn( a, false );

	ledOn( 12, on );

	delay( 100 );

}