sketch.pde
size(500,300);
background(255);
strokeWeight(5);
smooth();
float radius = 100;
int centX = 250;
int centY = 150;
stroke(0,30);
noFill();
ellipse(centX,centY,radius*2, radius*2);
stroke(220,50,70);
radius = 10;
float x,y;
float lastX = -999;
float lastY = -999;
for (float ang = 0; ang <= 1440; ang += 5){
radius += 0.5;
float rad = radians(ang);
x = centX + (radius*cos(rad));
y = centY + (radius*sin(rad));
if (lastX > -999){
line(x,y,lastX,lastY);
}
lastX = x;
lastY = y;
lastY = y;
}