Hello,
I should've explained this more clearly.
For each alcohol concentration, I have three groups and four samples that I have graded 1-4:
0% group one: 4, 4, 4, 3
0% group two: 4, 4, 4, 4
0% group three: 4, 4, 3, 3
1% group one: 3, 2, 2, 2
etc....
Thank you very much for your help. I think a stacked bar-plot is more suitable for my data.