creeper

//centralizei todo o meu desenho

<canvas width="600" height="400"></canvas>

<script>

    var tela= document.querySelector('canvas');
    var pincel= tela.getContext('2d');

    //quadro
    pincel.fillStyle= 'lightgrey';
    pincel.fillRect(0, 0, 600, 400);

    //cabeça
    pincel.fillStyle= 'darkgreen';
    pincel.fillRect(140, 50, 300, 300);

    //olhos
    pincel.fillStyle= 'black';
    pincel.fillRect(165, 110, 90, 90);
    pincel.fillRect(325, 110, 90, 90);

    //nariz
    pincel.fillRect(255, 200, 70, 100);

    //boca
    pincel.fillRect(215, 240, 40, 110);
    pincel.fillRect(325, 240, 40, 110);

</script>