Step 1  - Simplest dynamic change of div-element via JS. Was most difficult step ...
                 Would not able to find syntax of parseInt for '1111px' yet ...

 Step 2  - Back and Forth. 
 Step 3  - Movements scenario via funciton chaining.
 Step 4  - Expand an image
 Step 5  - Small addvance: Step 4 wrapped in object.
 Step 6  - Adding opacity.
 Step 7  - Just more features. Nothing principal: opacity with dimensions with mouseover and click.