foo = 32;   // 32 =      0b00100000
bar = 9;    //  9 =      0b00001001
baz = 10;   // 10 =      0b00001010
foo |= bar; // 32 | 9  = 0b00101001 = 41
            // now foo = 41
foo |= baz; // 41 | 10 = 0b00101011 = 43
            // now foo = 43