int LED[3] = {4,0,2};
int color[5] = {0,252,0,0,0};
int timer = 500;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED[0], OUTPUT);
  pinMode(LED[1], OUTPUT);
  pinMode(LED[2], OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

    for(int k = 0;k<=2;k++) digitalWrite(LED[k], color[k+1]);
    delay(timer);
    
  for(int i = 0; i<=2; i++){
    
    for(int j = 1; j<=84; j++){
      color[i+2] = color[i+2] +3;

      color[3] = color[3] + color[0];
      color[0] = 0;
      color[1] = color[4] + color[1];
      color[4] = 0;
      for(int k = 0;k<=2;k++) digitalWrite(LED[k], color[k+1]);
      delay(timer);
    }
      
    for(int j = 1; j<=84; j++){
      color[i+1] = color[i+1] -3;
      
      color[3] = color[3] + color[0];
      color[0] = 0;
      color[1] = color[4] + color[1];
      color[4] = 0;
      for(int k = 0;k<=2;k++) digitalWrite(LED[k], color[k+1]);
      delay(timer);
    }

  }
}