How to remain a code active after all macros have been executed - vba

Question

I have written multiple macros that will be executed with a command button however I want my last macro to remain active after all before macros have been executed. I want Macro15 to remain active after. And for for Macro15 I want if any cell changes I want to highlight that cell with colorindex 3
Sub RunallMacros()
macro1
macro2
macro3
macro5
Macro12
Macro13
Macro14
Macro15
End Sub
Sub macro1()
ThisWorkbook.Sheets("Main").Activate
End Sub
Sub macro2()
Dim myvalue As Variant
myvalue = InputBox("Enter Safety Stock Days")
Range("R5").value = myvalue
End Sub
Sub macro5()
Dim answer As Integer
answer = MsgBox("Are There Any ICF Forms?", vbYesNo + vbQuestion, "Other Sales")
If answer = vbYes Then ICFUserForm.Show
End Sub
Sub macro3()
Dim MyAnswer1 As Variant
Dim MyAnswer2 As Variant
Dim MyAnswer3 As Variant
Dim MyAnswer4 As Variant
Dim MyAnswer5 As Variant
MyAnswer1 = InputBox("Enter Growth Current Month")
Range("m3").value = MyAnswer1
MyAnswer2 = InputBox("Enter Growth Current Month+1")
Range("n3").value = MyAnswer2
MyAnswer3 = InputBox("Enter Growth Current Month+2")
Range("o3").value = MyAnswer3
MyAnswer4 = InputBox("Enter Growth Current Month+3")
Range("p3").value = MyAnswer4
MyAnswer5 = InputBox("Enter Growth Current Month+4")
Range("q3").value = MyAnswer5
End Sub
Sub Macro12()
ActiveCell.FormulaR1C1 = "='raw data'!R[-5]C"
Range("A7").Select
Selection.AutoFill Destination:=Range("A7:A500"), Type:=xlFillDefault
End Sub
Sub Macro13()
Range("C7").Select
Selection.ClearContents
End Sub
Sub Macro14()
For Each ws In ActiveWorkbook.Worksheets
If ws.Name <> "Raw" And ws.Name <> "Main" And ws.Name <> "Calendar" Then
For Each c In ws.Range("A50:A300")
ws.Rows(c.Row).Hidden = c.value = 0
Next
End If
Next
End Sub
Sub Macro15()
If Not Intersect(Target, Range("A7:AH500")) Is Nothing Or _
Not Intersect(Target, Range("A7:AH500")) Is Nothing Then
Target.Interior.ColorIndex = 3
End If
End Sub

Answer 1

A macro that is "active" is doing something, i.e. it is executing code. While it is executing code, the user can't do anything. So either the macro is active or the user is active.
What you want is to respond to an event, in this case the Worksheet.Change event:
Private Sub Worksheet_Change(ByVal Target as Range)
Target.Interior.ColorIndex = 3
End Sub
See https://msdn.microsoft.com/en-us/library/office/ff839775.aspx

Answer 2

Great answer from Paul - try this to get it working;
Private Sub Worksheet_Change(ByVal Sh As Object, ByVal Target as Range)
Target.Interior.ColorIndex = 3
End Sub