How can i add a count up timer that resets when a cell is updated?

Question

In my spreadsheet, I have a column where each cell has a drop down menu. What I am trying to do, is whenever the value for a cell in that column is changed, I need a minute/second timer that is counting up to reset back to 0:00 and start counting up again in the same row. For example, if I change the drop down menu in C2, I need the timer at F2 to reset and start counting up. How can this be done?