Making a bar plot with stack and dodge

Question

I have data as follows:

structure(list(value = structure(c(2, 3, 3, 4, 4, 5, 6, 6, 7, 
7, 8, 8, 9, 9, 1, 1, 2, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9
), label = NA