[ymeng] Chart - draw 1st rectanglar
[ymeng] chart - render basic staircase
[ymeng] chart - render a huge list in staircase pattern
[ymeng] chart - randomize items in array
[ymeng] chart - Refactor, convert to static method
[ymeng] chart - Sort array in one step using bubble sorting
[ymeng] chart - Animate procedure of bubble sorting
[ymeng] chart - try to beautify page
[ymeng] chart - Fix issue of highlight last element
[ymeng] Encapsulate rendering function to BubbleSortRender class
[ymeng] chart - Add control tool: pillar count & speed
[ymeng] chart - Can change count of sorted elements
[ymeng] chart - Can change speed of render