Adderwall Mountains/Tiles

1,-1; 2,-2; 3,-3; 4,-4; 1,0; 2,-1; 3,-2; 5,-4; 6,-5; 6,-6; 7,-7; 8,-7; 9,-8; 8,-7; 8,-6; 9,-7; 10,-8; 11,-9; 9,-6; 7,-4; -1,0; -1,0; -2,0; -2,-1; -3,-1