Определить сумму двух двумерных матриц — Pascal(Паскаль)

const 
n=3;
m=2;
var
m1,m2,m3:array[1..n,1..m] of integer;
i,j:integer;
begin
for i:=1 to n do
    begin 
        for j:=1 to m do
          begin
            m1[i,j]:=random(40);
            write('  ',m1[i,j]:3);
          end;
        writeln();
    end;
writeln('--------') ; 

for i:=1 to n do
    begin 
        for j:=1 to m do
          begin
            m2[i,j]:=random(40);
            write('  ',m2[i,j]:3);
          end;
        writeln();
    end;
writeln('--------') ; 

for i:=1 to n do
for j:=1 to m do
m3[i,j]:=m1[i,j]+m2[i,j];


writeln('--------') ; 

for i:=1 to n do
    begin 
        for j:=1 to m do
          begin
             write('  ',m3[i,j]:3);
          end;
        writeln();
    end;
    
end.