Draw letter(text) with UIBezierPath single line - ios

Question

I am using this and this for reference. I am new for using UIBezierPath, and i want to draw path on character(letter) code i am using is as follow.
CGMutablePathRef letters = CGPathCreateMutable();
CTFontRef font = CTFontCreateWithName(CFSTR("Courier New"), 200.0f, NULL);
NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:CFBridgingRelease(font), kCTFontAttributeName,nil];
NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:#"B"
attributes:attrs];
CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)attrString);
CFArrayRef runArray = CTLineGetGlyphRuns(line);
// for each RUN
for (CFIndex runIndex = 0; runIndex < CFArrayGetCount(runArray); runIndex++)
{
// Get FONT for this run
CTRunRef run = (CTRunRef)CFArrayGetValueAtIndex(runArray, runIndex);
CTFontRef runFont = CFDictionaryGetValue(CTRunGetAttributes(run), kCTFontAttributeName);
// for each GLYPH in run
for (CFIndex runGlyphIndex = 0; runGlyphIndex < CTRunGetGlyphCount(run); runGlyphIndex++)
{
// get Glyph & Glyph-data
CFRange thisGlyphRange = CFRangeMake(runGlyphIndex, 1);
CGGlyph glyph;
CGPoint position;
CTRunGetGlyphs(run, thisGlyphRange, &glyph);
CTRunGetPositions(run, thisGlyphRange, &position);
// Get PATH of outline
{
CGPathRef letter = CTFontCreatePathForGlyph(runFont, glyph, NULL);
CGAffineTransform t = CGAffineTransformMakeTranslation(position.x, position.y);
CGPathAddPath(letters, &t, letter);
CGPathRelease(letter);
}
}
}
CFRelease(line);
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointZero];
[path appendPath:[UIBezierPath bezierPathWithCGPath:letters]];
CGPathRelease(letters);
CFRelease(font);
NSLog(#"==> %#",path);
// Creates layer
CAShapeLayer *pathLayer = [CAShapeLayer layer];
pathLayer.frame = drawingView.bounds;
pathLayer.bounds = CGPathGetBoundingBox(path.CGPath);
//pathLayer.backgroundColor = [[UIColor yellowColor] CGColor];
pathLayer.geometryFlipped = NO;
pathLayer.path = path.CGPath;
pathLayer.strokeColor = [[UIColor blackColor] CGColor];
pathLayer.fillColor = nil;
pathLayer.lineWidth = 3.0f;
pathLayer.lineJoin = kCALineJoinBevel;
[drawingView.layer addSublayer:pathLayer];
self.pathLayer = pathLayer;
// Add pointer
UIImage *penImage = [UIImage imageNamed:#"hand.png"];
CALayer *penLayer = [CALayer layer];
penLayer.contents = (id)penImage.CGImage;
penLayer.anchorPoint = CGPointMake(0.35f, 0.98f);
penLayer.frame = CGRectMake(0.0f, 0.0f, penImage.size.width, penImage.size.height);
[pathLayer addSublayer:penLayer];
self.penLayer = penLayer;
CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:#"strokeEnd"];
pathAnimation.duration = 5.0;
pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
pathAnimation.toValue = [NSNumber numberWithFloat:1.0f];
[self.pathLayer addAnimation:pathAnimation forKey:#"strokeEnd"];
CAKeyframeAnimation *penAnimation = [CAKeyframeAnimation animationWithKeyPath:#"position"];
penAnimation.duration = 5.0;
penAnimation.path = self.pathLayer.path;
penAnimation.calculationMode = kCAAnimationPaced;
penAnimation.delegate = self;
[self.penLayer addAnimation:penAnimation forKey:#"position"];
This code draws latter latter in double line like the image below
instead i want to draw latter in single line like the image below
and the hand should draw the lines on centre of the font and not the border.