[Challenge 1] (http://codepen.io/tlgreg86/pen/egVvde)
[Challenge 2] (http://codepen.io/tlgreg86/pen/vgdxyw)
[Challenge 3] (http://codepen.io/tlgreg86/pen/EZQmPz)
[Challenge 4] (http://codepen.io/tlgreg86/pen/ggvqXR)
[Challenge 5] (http://codepen.io/tlgreg86/pen/ygvwBW)
[Challenge 6] (http://codepen.io/tlgreg86/pen/MJQxra)
[Challenge 7] (http://codepen.io/tlgreg86/pen/WRMmJV)
[Challenge 8] (http://codepen.io/tlgreg86/pen/OWQqEd)
[Challenge 9] (http://codepen.io/tlgreg86/pen/apqMQy)
[Challenge 10] (http://codepen.io/tlgreg86/pen/bgLZzX)
[Challenge 11] (http://codepen.io/tlgreg86/pen/ZLrZEe)
[Challenge 12] (http://codepen.io/tlgreg86/pen/pRaBjE)
[Challenge 13] (http://codepen.io/tlgreg86/pen/ZLrZpy)
[Challenge 14] (http://codepen.io/tlgreg86/pen/EZQJZE)
[Challenge 15] (http://codepen.io/tlgreg86/pen/mRXgLd)