javascript fill circle with color

// canvas context.fillStyle = "Color"
ctx.fillStyle = "#FF0000";      context.beginPath();
      context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
      context.fillStyle = 'green';
      context.fill();
      context.lineWidth = 5;
      context.strokeStyle = '#003300';
      context.stroke()