// Light Equalizer 
// by Ana Lucía Martínez Arias 

int distance=0; 
int i=0; 
 
void turn_all_off()            // function to turn off all the lights 
{                              
  int i; 
  for(i=0; i<10; i++)		//LEDS connected to digital pins 0 to 9 
  { 
    digitalWrite(i, LOW); 
  } 
} 
 
void setup(){ 
  Serial.begin(9600);	// sets the serial port to 9600 
  for (i=0; i<10; i++){ 
    pinMode(i, OUTPUT); 
  } 
  pinMode(48,OUTPUT); 
  digitalWrite(48,HIGH); 
} 
 
void loop(){ 
  turn_all_off();            // turns all lights off 
  distance = analogRead(0);  // sensor connected to analog pin 0 
  Serial.println(distance, DEC);  // prints the value read from the sensor 
 
 
  if((distance>50)){ 
    digitalWrite(0, HIGH);   // sets the current light on 
  } 
 
  if((distance>100)){ 
    digitalWrite(1, HIGH);   // sets the current light on 
  } 
 
  if((distance>150)){ 
    digitalWrite(2, HIGH);   // sets the current light on 
  } 
 
  if((distance>200)){ 
    digitalWrite(3, HIGH);   // sets the current light on 
  } 
 
  if((distance>250)){ 
    digitalWrite(4, HIGH);   // sets the current light on 
  } 
 
  if((distance>300)){ 
    digitalWrite(5, HIGH);   // sets the current light on 
  } 
  
  if((distance>350)){ 
    digitalWrite(6, HIGH);   // sets the current light on 
  } 
  
  if((distance>400)){ 
    digitalWrite(7, HIGH);   // sets the current light on 
  } 
  
  if((distance>450)){ 
    digitalWrite(8, HIGH);   // sets the current light on 
  } 
  
  if((distance>500)){ 
    digitalWrite(9, HIGH);   // sets the current light on 
  } 
 
  delay(50); 
}