 #define SERVO_PIN_VIRT 8 // PB0
 #define SERVO_PIN_HORZ 9 // PB1
 
+// When the last move was attempted.
+unsigned long move_last = 0; 
+// The move delay.
+const long move_interval = 100; 
+
 Servo servo_virt;
 Servo servo_horz;
 

    servo_virt.attach(SERVO_PIN_VIRT);
    servo_horz.attach(SERVO_PIN_HORZ);
    
    servo_virt.write(90);
    servo_horz.write(90);
}

void loop()
{
    // Move the panels if needed.
    tkr_move();
    delay(100); 
}

void tkr_move()

/* 

Connect the photoresistor one leg to pin 0, and pin to +5V
Connect a resistor from pin 0 to GND.
Need to try in sunlight to get better idea of good resistor value.

----------------------------------------------------

           PhotoR     10K
 +5    o---/\/\/--.--/\/\/---o GND
                  |
 Pin 0 o-----------
