How to run 2 macros when worksheet is updated

Hello,
I am a total newbie in this and I would really appreaciate your help. I am trying to make macro for counting of cells of same colour in a sheet. I googled and modified and tested and this 2 macros work:

Function CountColor(InRange As Range, ColorIndex As Long) As Long
Dim R As Range
Dim N As Long
Dim CI As Long
CI = ColorIndex
For Each R In InRange.Cells
If R.Interior.ColorIndex = CI Then
N = N + 1
End If
Next R
CountColor = N
End Function

Function whatcolorindex(rcell)
whatcolorindex = rcell.Interior.ColorIndex
End Function

This works perfectly for what I need.
But when the sheet is changed, I need to update values given by these macros manually, even F9 does not work. I tried to use:
Private Sub Worksheet_Change(ByVal Target As Range)
whatcolorindex
CountColor
End Sub
but is seems that Private sub can only make one macro at time, am I right or absolulety wrong? How to make the 2 macros run every time the worksheet changes (colour or value)?
Thank you in advance for your ideas and comments!
Veronika