< progress >
element, ensuring you can stack progress bars, animate them, and place text labels over them.
.progress, so if you change that value the inner .progress-bar will automatically resize accordingly. .progress-bar-striped to any .progress-bar to apply a stripe via CSS gradient over the progress bar’s background color. .progress-bar-animated to .progress-bar to animate the stripes right to left via CSS3 animations. 
