geom_point separation into subgroups

Question

I have a data set, of which this is a sample:

KO: WT, WT, 13-1,13-1,13-2,WT,13-1,13-1,13-2,13-2
Rep: A,A,A,A,A,B,B,B,B,B
Day: 1,2,3,4,5,1,2,3,4,5
NewLeaf:2,5,