void setup(){
size(500, 500);
smooth();
noFill();
background(255);
float centerX = width / 2.0;
float centerY = height / 2.0;
float diameter = 400;
float radious = diameter / 2.0;
stroke(192);
strokeWeight(7);
arc(centerX, centerY, diameter, diameter, 0, 2.0*PI);
stroke(0);
strokeWeight(1);
int numSteps = 100;
float angleStepSize = 2.0 * PI / numSteps;
for(int i = 0; i < numSteps; i++){
float x = radious * cos(angleStepSize * i) + centerX;
float y = radious * sin(angleStepSize * i) + centerX;
float nextX = radious * cos(angleStepSize * (i + 1)) + centerX;
float nextY = radious * sin(angleStepSize * (i + 1)) + centerX;
line(x, y, nextX, nextY);
}
}