Excel 2010: Adding rows based on value from other cell

Hi,

I see that similar questions have been answered many times but mine is a bit different.

First of all, i would like to say that i am very new to Excel VBA so explaining in detail will be appreciated.

Action done: Value entered in cell F4 = x and hit ENTER
Effect desired: x-1 rows should be added below cell F4

Action done: Value of cell F4 changed to = y and hit ENTER
Effect desired: x-1 rows should be changed to y-1 rows below cell F4

This should happen for all values entered in column F starting from cell F4.

Thanks in advance for helping me.

Thank you!