Picross - Nonogram

Play random boards up to 10 x10, can save your solution and visualize your performance.
How to play:
You have a series of boxes that must be painted black or marked left blank.
Next to each row the number of consecutive boxes appear in black for that row. On each column in the grid displayed the number of squares in a row for that black for that column. Your goal is to find all black squares.
For example a series of numbers as 2 1 4 means 2 consecutive black squares, one or more white squares, a black box, one or more white squares and finally 4 row black boxes