Make the code run only when shape is selected not after every 1 second.

[ashni]

this code is written to update the shape of the color whenever i drag n drop it according to its position. it is called once in workbook_open() event
But it is running all the time from opening the workbook till closing it.
Is there any method to make it run only when shape is selected.

Sub UpdateColor()
Dim ShapeXValue As Double
Dim datetRunTme As Date
Const TimeInterval As String = "00:00:01"


 'create error if selection does not involve a shape
On Error GoTo NoShapeSelected
 'amend colour based on selection.left
ShapeXValue = Selection.Left
Dim colour As Long
Select Case ShapeXValue
    Case Is < Range("G4", "G4").Left: colour = RGB(255, 128, 0)
    Case Is < Range("N4", "N4").Left: colour = RGB(0, 153, 0)
    Case Else: colour = RGB(219, 38, 10)
End Select


Selection.ShapeRange.Fill.ForeColor.RGB = colour


NoShapeSelected:
 'configure routine to run again
datetRunTme = Now + TimeValue(TimeInterval)
Application.OnTime earliesttime:=datetRunTme, procedure:="UpdateColor", schedule:=True


End Sub