Arc Angle Oscillation Problem

float colUpdate = 0.0;
float len = PI;

float freq = .1;

//Color Variables
double colR = 0.0;
double colG = 0.0;
double colB = 0.0;

//Color Oscillation Variables
int colorStart = 128;
int colorSpan = 127;

//Arc Position Variables
double xPos = 0.0;
double yPos = 0.0;

//Arc Position Oscillation Variables
int widthStart = 0;
int widthSpan = 0;
int heightStart = 0;
int heightSpan = 0;

//Arc Rotation Variables
double arcAngle1 = 0.0;
double arcAngle2 = 0.0;

//Arc Rotation Oscillation variables
float arcAngle1Start = 0.0;
float arcAngle1Span = 0.0;
float arcAngle2Start = 0.0;
float arcAngle2Span = 0.0;

void setup(){
  size(1000, 500);
  frameRate(10);
  background(255,255,255);
}

void draw(){
  //Misc
  len += 1;
  noFill();

  //Setting Values for Arc Position Oscillation
  widthStart = width/2;
  widthSpan = width/3;
  heightStart = height/2;
  heightSpan = height/3;

  //Setting Values for Arc Rotation Oscillation
  arcAngle1Start = -HALF_PI;
  arcAngle1Span = HALF_PI;
  arcAngle2Start = HALF_PI;
  arcAngle2Span= HALF_PI;

  //Sine Oscillation for Color and Arc Position
  for (int i = 0; i < len; ++i)
  {
     colR = Math.sin(freq*i + 0) * colorSpan + colorStart;
     colG = Math.sin(freq*i + 2) * colorSpan + colorStart;
     colB = Math.sin(freq*i + 4) * colorSpan + colorStart;

     xPos = Math.sin(freq*i) * widthSpan + widthStart;
     yPos = Math.sin((2*freq)*i) * heightSpan + heightStart;

     arcAngle1 = Math.sin(freq*i) * arcAngle1Span + arcAngle1Start;
     arcAngle2 = Math.sin(freq*i) * arcAngle2Span + arcAngle2Start;
  }


  //Choosing Color of Arc Using the Color Doubles Converted to Floats
  stroke(Float.parseFloat(new Double(colR).toString()),Float.parseFloat(new Double(colG).toString()),Float.parseFloat(new Double(colB).toString()));

  //Drawing the Arc Using the Same Float Conversion Method
  arc(Float.parseFloat(new Double(xPos).toString()), Float.parseFloat(new Double(yPos).toString()), 50, 100, Float.parseFloat(new Double(arcAngle1).toString()), Float.parseFloat(new Double(arcAngle2).toString()));
}