Difficult Timer question

[Nunwithgun]

I'm stuck on a timer issue. I need a timer that is automatically activated upon opening excel (not clicking a button to activate it) I have multiple sheets so far and I need a timer to automatically add the value from sheet1 C14 to cell E14 in the same sheet every 3 seconds. C14 starts at 0 but can be increased by 1 infinant amount of times (which I know how to do that little part).E14 should not exceed 60 before a button would need to be used to "collect" the value in E14. I need to reset the value in E14 with that "collect" button to 0 but continue to increase after collecting. Then, with that "collect" button it takes the value in E14 and adds it to H1 in Sheet1 and Sheet2. Phew.....