class Train {
  int xpos;
  int ypos;
  int trainSpeed;
  int smokeSpeed;
  int smokepos;
     
  int smokeSize;
  int smokeSizeSpeed;
     
     
  Train(int xp, int yp, int iSpeed) {
     xpos = xp;
     ypos = yp;
     trainSpeed = iSpeed;
     smokeSpeed = 1;
     smokepos = 126;
     
     smokeSize = 4;
     smokeSizeSpeed = 2;
  }

    
  void render () {
    rect(65 + xpos, 145 + ypos, 50, 10);
    rect(70 + xpos, 155 + ypos, 40, 30);
    rect(135 + xpos, 165 + ypos, 15, 20);
    rect(60 + xpos, 185 + ypos, 100, 55);
    
    ellipse(80 + xpos, 240 + ypos, 30, 30);
    ellipse(130 + xpos, 240 + ypos, 30, 30);

    line(75 + xpos, 235 + ypos, 130 + xpos, 235 + ypos);
    line(80 + xpos, 245 + ypos, 135 + xpos, 245 + ypos);

    smokepos = smokepos - smokeSpeed; 
    
    if (smokepos < 110) {
      smokepos = 160;
    } 
 
   smokeSize = smokeSize + smokeSizeSpeed;
    if (smokeSize > 20) {
      smokeSize = 4;
    } 
           
    ellipse(143 + xpos, smokepos + ypos, smokeSize, smokeSize);
    //ellipse(143 + xpos, 140 + ypos, 12, 12);
    //ellipse(143 + xpos, 154 + ypos, 16, 16);
    }


  void drive () {
    xpos = xpos + trainSpeed;
  
    if (xpos > 350) {
      xpos = -175;
    }
  }
  
  
}






//Train myTrain1;
//Train myTrain2;
int xRow = -140;

int MAX = 4;
Train[] trains = new Train[MAX];

int xpos = -175;
int railcount = 0;
              
void setup() {
  size(400, 600);

for (int i = 0; i < MAX; i++) {

    //xRow = 1;
    //if (xRow < 2) {
    //  xRow = xRow + 140;
    //}
    //println(xRow);
    
    trains[i] = new Train(-175, xRow, int(random(1, 9)));
    
    xRow = xRow + 140;
  }
  
    //myTrain1 = new Train(-175, 1, int(random(1, 9)));
  //myTrain2 = new Train(-175, -140, int(random(1, 9)));

  //line(0, 255, 400, 255);
}

void draw() {
  framerate(30);
  background(255, 255, 255);
  
  for (int i = 0; i < MAX; i++) {
    trains[i].render();
    trains[i].drive();
  }
  
  //myTrain1.render();
  //myTrain1.drive();
  
  
  //myTrain2.render();
  //myTrain2.drive();
}