Here’s a chart for you to test if your browser suports unicodes. This reminds me of the BBS days where one uses them to create simple cool graphics.

Character Decimal Hex Name
?€ 9600 2580 UPPER HALF BLOCK (present in WGL4)
??9601 2581 LOWER ONE EIGHTH BLOCK
??9602 2582 LOWER ONE QUARTER BLOCK
??9603 2583 LOWER THREE EIGHTHS BLOCK
??9604 2584 LOWER HALF BLOCK (present in WGL4)
??9605 2585 LOWER FIVE EIGHTHS BLOCK
??9606 2586 LOWER THREE QUARTERS BLOCK
??9607 2587 LOWER SEVEN EIGHTHS BLOCK
??9608 2588 FULL BLOCK (present in WGL4)
??9609 2589 LEFT SEVEN EIGHTHS BLOCK
??9610 258A LEFT THREE QUARTERS BLOCK
??9611 258B LEFT FIVE EIGHTHS BLOCK
??9612 258C LEFT HALF BLOCK (present in WGL4)
??9613 258D LEFT THREE EIGHTHS BLOCK
??9614 258E LEFT ONE QUARTER BLOCK
??9615 258F LEFT ONE EIGHTH BLOCK
??9616 2590 RIGHT HALF BLOCK (present in WGL4)
??9617 2591 LIGHT SHADE (present in WGL4)
??9618 2592 MEDIUM SHADE (present in WGL4)
??9619 2593 DARK SHADE (present in WGL4)
??9620 2594 UPPER ONE EIGHTH BLOCK
??9621 2595 RIGHT ONE EIGHTH BLOCK
??9622 2596 QUADRANT LOWER LEFT
??9623 2597 QUADRANT LOWER RIGHT
??9624 2598 QUADRANT UPPER LEFT
??9625 2599 QUADRANT UPPER LEFT AND LOWER LEFT AND LOWER RIGHT
??9626 259A QUADRANT UPPER LEFT AND LOWER RIGHT
??9627 259B QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER LEFT
??9628 259C QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER RIGHT
??9629 259D QUADRANT UPPER RIGHT
??9630 259E QUADRANT UPPER RIGHT AND LOWER LEFT
??9631 259F QUADRANT UPPER RIGHT AND LOWER LEFT AND LOWER RIGHT

Source: Alanwood.net