love.graphics.line(x+10,y+2, x+18,y+10)
  love.graphics.line(x+18,y+10, x+16,y+18)
  love.graphics.line(x+16,y+18, x+4,y+18)
  love.graphics.line(x+4,y+18, x+2,y+10)
  love.graphics.line(x+2,y+10, x+10,y+2)

  local offsets
  if Current_drawing_submode == 3 then
    offsets = {{10,4}, {4,16}, {16,16}}
  elseif Current_drawing_submode == 4 then
    offsets = {{4,4}, {4,16}, {16,16}, {16,4}}
  elseif Current_drawing_submode == 5 then
    offsets = {{10,2}, {18,10}, {16,18}, {4,18}, {2,10}}
  elseif Current_drawing_submode == 6 then
    offsets = {{7,4}, {13,4}, {16,10}, {13,16}, {7,16}, {4,10}}
  elseif Current_drawing_submode == 7 then
    -- not quite right
    offsets = {{7,4}, {12,5}, {15,11}, {12,15}, {6,17}, {4,12}, {4,8}}
  elseif Current_drawing_submode == 8 then
    offsets = {{4,4}, {2,10}, {4,16}, {10,18}, {16,16}, {18,10}, {16,4}, {10,2}}
  elseif Current_drawing_submode == 9 then
    -- not quite right
    offsets = {{10,4}, {6,8}, {5,12}, {4,16}, {8,18}, {12,18}, {16,16}, {15,11}, {14,8}}
  else
    print(Current_drawing_submode)
    assert(false)
  end
  for i=1,#offsets-1 do
    love.graphics.line(x+offsets[i][1],y+offsets[i][2], x+offsets[i+1][1],y+offsets[i+1][2])
  end
  love.graphics.line(x+offsets[#offsets][1],y+offsets[#offsets][2], x+offsets[1][1],y+offsets[1][2])

--?     print(prevx-cx,prevy-cy)