That's covered in the Extended Cut for Flashing Text. You just need to add an If/Then condition based on the value of your CHECK BOX (not "tick" box).

Richard this is the original VBA I made in a continuous form, it did function, however when I untick the LIVE checkbox in  one row of the continuous form it also affect the other rows.

Private Sub Form_Timer()
If LIVE= -1 Then

Please take a minute to read the Rules for Posting. Don't copy and paste 50 lines of code here asking for us to troubleshoot it. After taking a brief look at it, you may be running into trouble with the word LIVE. Put brackets around it, or try changing it to something that's not a reserved word. It's not on the official reserved words list, but I'm not sure it's allowed either. Also, don't check for -1 with your values. Use TRUE and FALSE, or at least 0 and <>0. Don't rely on -1. Also if LIVE is a text box, it might be TEXT in the box, not a numeric value. I can't tell without seeing your database.

Hi Richard sorry about it. The LIVE is a check box and it should trigger a textbox to flash when that LIVE will be ticked and unticked. It did not work mate because I am not sure on the conditional formatting. Thanks

I would recommend learning about Conditional Formatting first then. This (the flashing text in a continuous form) is NOT an easy topic. If you're not well versed in these concepts already, you're going to have trouble with it.