#define CENTER		IN_1
#define MOTOR		OUT_A

task main
{
	Sensor(CENTER, IN_SWITCH);

	if (CENTER == 0) {
		/* valve must be centered at start of day */
		return;
	}
	while (true) {
		Fwd(MOTOR, 7);
		while (CENTER == 1);
		Sleep(200);
		Off(MOTOR);
		Sleep(100);
		Rev(MOTOR, 7);
		while (CENTER == 0);
		Off(MOTOR);
		Sleep(100);

		Rev(MOTOR, 7);
		while (CENTER == 1);
		Sleep(200);
		Off(MOTOR);
		Sleep(100);
		Fwd(MOTOR, 7);
		while (CENTER == 0);
		Off(MOTOR);
		Sleep(100);
	}
}