int e1_size = 30;
int e2_size = 50;
int e3_size = 70;
int e4_size = 20;
float e1_x, e1_y = 0;
float e2_x, e2_y = 0;
float e3_x, e3_y = 0;
float e4_x, e4_y = 0;
float e1_speed = 6.0;
float e2_speed = 20.0;
float e3_speed = 8.0;
float e4_speed = 6.0;
int variable=40;
float var_position=random(-50, 50);



void setup()
{
    size(800, 400);
    stroke(102);
    smooth();
    frameRate(10);
    background(0);
     PFont font;
   font = loadFont("HelveticaNeue-48.vlw");
    textFont(font, 240);

}



void draw()
{

  fill(0,5);
  rect(0,0,width, height);


    noFill();
    noStroke();

    beginShape();
    for(int i=0; i<width; i++) {
     vertex(i, singraph((float)i/width)*height);
    }
    endShape();



    e1_x += e1_speed;
    if (e1_x>width){
      e1_x=0;
      variable=variable+40;
    }
    e1_y = singraph((float)e1_x/width)*height;
    noStroke();
     textSize(40);
    fill(255,variable);
    text(key,e1_x, pmouseY);



      e2_x += e2_speed;
    if (e2_x>width){
      e2_x=0;
      variable=variable+10;
      var_position=var_position+10;
    }
    e2_y = singraph((float)e2_x/width/2)*height+var_position;

    noStroke();
    fill(255, variable);
    textSize(60);
    text(key,e2_x, pmouseY);

     e3_x += e3_speed;
    if (e3_x>width){
      e3_x=0;
    }
    e3_y = singraph((float)e2_x/width/2)*height+var_position;
     noStroke();
    fill(255,variable);
    textSize(30);
    text(key,e3_x, pmouseY);
    
    
        e4_x += e4_speed;
    if (e4_x>width){
      e4_x=0;
    }
    e4_y = singraph((float)e4_x/width/2)*height+var_position;
     noStroke();
    fill(255,variable);
    textSize(30);
    text(key,e4_x, pmouseY);
      


}

float singraph(float sa) {
    sa = (sa - 0.1) * 1; //scale from -1 to 1
    sa = cos(sa*PI)/2 + 0.3;
    return sa;
}

float quad(float sa) {
    return sa*sa*sa*sa;
}

float hump(float sa) {
    sa = (sa - 0.5) * 10; //scale from -2 to 2
    sa = sa*sa;
    if(sa > 1) { sa = 1; }
    return 1-sa;
}