" ": 1 - !!! 2 - 3 - 4 - . , .
. . "" . "" . , , , , ..
( ) – . - , . . , . .
- . : color - line - poge - undo - redo - , clear - play - . !
" ": 1 - : "-". 2 - . 3 - . 4 - . , . 5 - . . 6 - ...... 15 - - . - . 16 - . 17 - .