How would I call for a message box to be displayed after each line of code in
the macro below? The purpose is only to halt the macro until I tell it to
proceed to the next line.

Sub Optimize()
'
' Optimize Macro
' Run through series of percentages
'
' Keyboard Shortcut: Ctrl+Shift+O
'
Application.Run "PERSONAL.XLS!MoveCursorNot"
ActiveCell.FormulaR1C1 = "0.0001"
ActiveCell.FormulaR1C1 = "0.0002"
ActiveCell.FormulaR1C1 = "0.0003"
ActiveCell.FormulaR1C1 = "0.0004"
ActiveCell.FormulaR1C1 = "0.0005"
End Sub