below is the programming that i have created. When i enter "10" in cell A2 I
receive an error. Please assist me.

Public RunWhen As Double
Public timer_value As Integer
Public Const cRunIntervalSeconds = 1 ' 1 Second
Public Const cRunWhat = "The_Sub"

Sub StartTimer()
RunWhen = Now + TimeSerial(0, 0, cRunIntervalSeconds)
Application.OnTime earliesttime:=RunWhen, procedu=cRunWhat,
schedule:=True
End Sub


Sub The_Sub()

'get the current timer value
'timer_value = Range("timer").Value
timer_value = ActiveCell.FormulaR2C1

'now increase "level now" if the timer has got down to Zero
If timer_value = 0 Then Range("level_now").Value = Range("level_now").Value
+ 1

'now reduce the timer by 1, or reset to the duration if it's on Zero
If timer_value = 0 Then Range("timer").Value = Range("duration").Value Else
Range("timer").Value = timer_value - 1

'now beep in last ten seconds, first getting the new timer value
timer_value = Range("timer").Value
If timer_value 0 And timer_value < 11 Then Beep

StartTimer

End Sub


Sub StopTimer()
On Error Resume Next
Application.OnTime earliesttime:=RunWhen, procedu=cRunWhat,
schedule:=False
Range("timer").Value = Range("duration").Value
End Sub


Sub PauseTimer()
On Error Resume Next
Application.OnTime earliesttime:=RunWhen, procedu=cRunWhat,
schedule:=False
End Sub


Sub ResumeTimer()
RunWhen = Now + TimeSerial(0, 0, cRunIntervalSeconds)
Application.OnTime earliesttime:=RunWhen, procedu=cRunWhat,
schedule:=True
End Sub
--
Rick