for (let i = 0; i < serpi.length; i++) {
    if (i == 0 && serpi.length == 1) {
      ctx.drawImage(obj3, serpi[i].x, serpi[i].y);
    } else if (i == 0) {
        if (d == "LEFT") ctx.drawImage(obj1, 25, 0, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
        if (d == "UP") ctx.drawImage(obj1, 0, 25*1, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
        if (d == "RIGHT") ctx.drawImage(obj1, 0, 0, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
        if (d == "DOWN") ctx.drawImage(obj1, 25*1, 25*1, 25, 25, serpi[i].x, serpi[i].y, 25, 25);               
    }else if(i==serpi.length-1){
      if (d == "LEFT") ctx.drawImage(obj1, 0, 0, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
      if (d == "UP") ctx.drawImage(obj1, 25*1, 25*1, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
      if (d == "RIGHT") ctx.drawImage(obj1, 25, 0, 25, 25, serpi[i].x, serpi[i].y, 25, 25);
      if (d == "DOWN") ctx.drawImage(obj1, 0, 25*1, 25, 25, serpi[i].x, serpi[i].y, 25, 25); 
    }else {
      ctx.drawImage(obj2, serpi[i].x, serpi[i].y);
    }
  }