I started with the key features of the head and body. Then I played with different colours and added a party hat.
function setup() {
// background
createCanvas(600, 600);
background(175, 220, 212);
}
function draw() {
// hair
fill(51, 29, 7);
noStroke();
rect(90, 118, 466, 740, 233, 233);
// body
fill(255);
noStroke();
ellipse(325, 645, 243, 374);
// head
fill(253, 198, 137);
noStroke();
ellipse(324, 356, 360, 360);
// left ear
fill(253, 198, 137);
noStroke();
ellipse(144, 387, 67, 67);
// right ear
fill(253, 198, 137);
noStroke();
ellipse(502, 355, 61, 61);
// left eye
fill(255);
noStroke();
ellipse(224, 349, 80, 80);
// right eye
fill(255);
noStroke();
ellipse(439, 332, 72, 72);
// left pupil
fill(0);
noStroke();
ellipse(224, 349, 59, 59);
// right pupil
fill(0);
noStroke();
ellipse(439, 332, 52, 52);
// mouth
fill(250, 139, 139);
noStroke();
arc(330, 420, 80, 80, 0, PI + QUARTER_PI, CHORD);
// hat
fill(240, 110, 170);
noStroke();
triangle(261, 149, 304, 26, 363, 142);
}