Adds easing visual examples #24

[hirako2000]

#24

[sasha240100]

@hirako2000 Could you please rather replace existing examples?

[hirako2000]

I thought about it, but I'm not sure we should replace them.. here is my thought:

• Transform on numbers is technical, very accurate.
• Visuals is more natural to understand the transform, rather than number but is not accurate.

I imagine experienced users would like the examples with numbers, while people new to tweening would understand better with visuals, why not keeping both?