Identify the corner and create a step size slant

I want to display 6 on a slant, as shown in the highlighted area. My code is below. I want to start 6 at A(i,n-.4*n) then have a s "step" for the next row then the next and so on unit the row = (.6*n)-1. The step size has the variable in because my code has to change with different inputs of n.

n=10
  for i=1:n-.6*n
      for j=(.6*n)-1
        A((.6*n)-1,n)= 4;

          A(i,n-.4*n)=6;
        end

    end

[Walter Roberson]

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