Add timer functionality to Google Sheets spreadsheet

I'm trying to make a Google Sheets spreadsheet that can help me track my time spent on the tasks assigned to me. I can provide the Google Sheets spreadsheet shown with totals working but no button functionality As I see it, I would like two types of buttons: Play/Pause button: ▶️ (initial state), when pressed, starts stopwatch counting up for that row. (also changes image to ⏸ & pauses any other stopwatches in sheet which may be counting up, only one row would be actively counting up at any time, with the addition of the total time counting up) ⏸ when pressed, stops stopwatch (also changes image to ▶️ ) Completed button: ⬜️ (initial state), when pressed, stops stopwatch for that row if its counting up (also changes image to ✅ ) ✅ when pressed, switches image back to ⬜️) I would input into "work" & "predicted time (m)" columns - you don't have to deal with that. "elapsed time" would be blank until time is recorded there through the buttons. I must be able to copy & paste more rows (up to 100), all with timer functionality as I get more tasks. Thanks so much!