Hi I was wondering if anyone is able to help me work out how to make an arc start from 0 and increase in width/height to fill a circle.

I'm trying to use a for loop at the moment to gradually increase but I'm unsure which parameters to increase. I've tried the width and height of the arc and also now tried the start and end angle of the arc but haven't had any results.

Thanks so much for any help.

Here's my code:

float arcW=0;
float arcH=0;
float angleTurn=0;
float angleTurnH=0;

float deg = 1;
float rad = radians(deg);
//println(deg + " degrees is " + rad + " radians");


void setup()
{
 size(500,500);
 background(210);
 smooth();
 noLoop();
 
}

void draw()
{
 strokeWeight(18);
 stroke(255,14);
 fill(255,24);
 ellipse(250,250,15,15);
 //globe();
 arcRotate();
 
/*if (mousePressed == true)    //had this in draw before for other parameters of arc
 {
   if (mouseButton == LEFT)
   {
 for(arcW=0;arcW<=150;arcW=arcW+10);
 {
   for(arcH=0;arcH<=150;arcH=arcH+10);
   {
     fill(100);
     arc(250, 100, arcW, arcH, PI/2, TWO_PI-PI/2);//TWO_PI);
   }
 }
   }
 }*/
}

 
void globe()
{
 stroke(255,80);
 strokeWeight(2);
 fill(255,80);
 ellipse(250,100,150,150);
}

void arcRotate()
{
 for(angleTurn=0;angleTurn<=TWO_PI/2;angleTurn=angleTurn+rad);
 {
   for(angleTurnH=0;angleTurnH<=TWO_PI/2;angleTurnH=angleTurnH+rad);
   {
     fill(0);
     arc(250, 100, 150, 150, angleTurn, angleTurnH);//TWO_PI);
 }
 }
 
}