//Controlling Elli

//Elli body segment variables
int[] elliX = new int[7];
int[] elliY = new int[7];
color[] elliC = new color[7];

//Elli movement values
boolean up = false;
boolean down = false;
int udmod = 0;
boolean right = true;
boolean left = false;
int rlmod = 1;

void setup(){
  background(255);
  //Variables to be modified on program initialition
  int initX = 20;
  int initY = 20;
  color initC = color(100, 0, 0);
  float initCR = red(initC);
  //Setting the size and framerate of the program window
  size(800, 800);
  frameRate(8);
  //Setup for each of Elli's X values
  for(int i = 0; i < elliX.length; ++i){
    elliX[i] = initX;
    initX += 20;
  }
  //Setup for each of Elli's Y values
  for(int i = 0; i < elliY.length; ++i){
    elliY[i] = initY;
  }
  //Setup for each of Elli's color values
  for(int i = 0; i < elliC.length; ++i){
    elliC[i] = initC;
    initCR += 30;
    initC = color(initCR, 0, 0);
  }
}

void draw(){
  if(keyPressed && keyCode == UP && !up && !down){
    down = false;
    right = false;
    left = false;
    up = true;
    rlmod = 0;
    udmod = -1;
  }
  if(keyPressed && keyCode == DOWN && !down && !up){
    up = false;
    right = false;
    left = false;
    down = true;
    rlmod = 0;
    udmod = 1;
  }
  if(keyPressed && keyCode == RIGHT && !right && !left){
    left = false;
    up = false;
    down = false;
    right = true;
    udmod = 0;
    rlmod = 1;
  }
  if(keyPressed && keyCode == LEFT && !left && !right){
    right = false;
    up = false;
    down = false;
    left = true;
    udmod = 0;
    rlmod = -1;
  }
  //Redrawing background every frame
  background(255);
  //Drawing Elli every frame
  elli();
  //Modifying Elli's X position for next frame
  for(int i = 0; i < elliX.length; ++i){
    if(i != elliX.length-1){
      elliX[i] = elliX[i+1];
    }
    else if(i == elliX.length-1){
      elliX[i] += 20*rlmod;
    }
  }
  //Modifying Elli's Y position for next frame
  for(int i = 0; i <elliY.length; ++i){
    if(i != elliY.length-1){
      elliY[i] = elliY[i+1];
    }
      else if(i == elliY.length-1){
      elliY[i] += 20*udmod;
    }
  }
}

void elli(){
  //Preventing index out of bounds error
  int count = min(elliX.length, elliY.length);
  //Drawing each of Elli's segments
  for(int i = 0; i < count; ++i){
    fill(elliC[i]);
    //Drawing Elli's basic segments
    if(i != count-1){
      circle(elliX[i], elliY[i], 30);
    }
    //Drawing Elli's face segment
    else if(i == count-1){
      circle(elliX[i], elliY[i], 30);
      fill(0);
      circle(elliX[i]-5, elliY[i], 5);
      circle(elliX[i]+5, elliY[i], 5);
    }
  }
}