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let angleSlider
function setup() {
createCanvas(400, 400);
angleMode(DEGREES);
textAlign(CENTER, CENTER);
textSize(24)
noStroke();
angleSlider = createSlider(0, 360, 90, 30);
angleSlider.position(100, 40);
angleSlider.style('width', '200px');
}
function draw() {
background(220);
let angle = angleSlider.value()
fill(255)
arc(200, 200, 200, 200, 0, angle)
fill(20)
text(angle+"°", 200, 200)
}