how to make cells in excel 97 blink

Yes, You can loop the background color from white to color to white.
Or,
You can write the value or text to a variable, erase the cell then re-write the cell contents from the variable in a loop.

In both cases you will need to test for a cursor, active cell click or focus to break the timer loop in your flash code or the loop will run endlessly. Test it with a set number of flashes or build the break code first. JSW

Do you do this loop in VB? Can you give me an example?

Thanks

Loop VB code to Flash Cell Range.

The code can be chanhed to work on some condition. If you edit a cell in the range before the loop is finished, the cell color on exit will be set! The second macro will re-set the cell color if by chance this happens. The code below is commented to help costomize the options. JSW

Sub Flash()
'Make cell range flash x times, in x color, when Ctrl-a is pressed.
'
Dim newColor As Integer
Dim myCell As Range
Dim x As Integer

'Make this cell range flash!
Set myCell = Range("A1:A2")

'Make cell flash to this color!
newColor = 8

'Make cell flash, this many times!
Do Until x = 5

'Run loop!
DoEvents
Start = Timer
Delay = Start + 1
Do Until Timer > Delay
DoEvents
myCell.Interior.ColorIndex = newColor
Loop
Start = Timer
Delay = Start + 1
Do Until Timer > Delay
DoEvents
myCell.Interior.ColorIndex = xlNone
Loop
x = x + 1
Loop

End Sub

Sub reSetFlash()
'Re-set cell range color if edit break on color, Ctrl-r to re-set!
ActiveCell.Select
Selection.Interior.ColorIndex = xlNone
End Sub