let dir = 1;

let x;

let y;

let pmDir = 0;

let xDir = 0;

let yDir = 0;

let speed = 4;

let radius = 25;

​

function setup() {

  createCanvas(400, 400);

    x = width / 2;

    y = height / 2;

}

​

function draw() {

  background(0);

    move();

    pacMan();

​

}   

​

function keyPressed(){

if (keyCode === UP_ARROW) {

    pmDir = -HALF_PI;

    xDir = 0;

    yDir = -1;

}

else if (keyCode === DOWN_ARROW) {

    pmDir = HALF_PI;

    xDir = 0;

    yDir = 1;

}

else if (keyCode === RIGHT_ARROW) {

    pmDir = 0;

    xDir = 1;

    yDir = 0;

}

​

else if (keyCode === LEFT_ARROW) {

    pmDir = PI;

    xDir = -1;

    yDir = 0;

}

    else return -1;

}

​

function move(){

    if (xDir == 1 && x < width-radius){

        x += xDir*speed;

    }

    else if (xDir == -1 && x > 0+radius){

        x += xDir*speed;

    }

    if (yDir == 1 && y < height-radius)

    {

        y += yDir*speed;

    }

    else if (yDir == -1 && y > radius)

    {

        y += yDir*speed;

    }

}

​

function pacMan(){

    push();

    translate(x,y);

  rotate(pmDir);

    noStroke();

    fill(255,255,0);

    arc(0,0,radius*2,radius*2,angle, -angle);

    if (angle >= 0.75) dir = -1;

    if (angle <= 0.05) dir = 1;

    angle += (dir * 0.08);

    pop();

}