Information on the structure of the background graphic

The background graphic must be structured vertically. From top to bottom, it must have the following states and they must have exactly the same size:

  1. Normal
  2. Mouseover
  3. Drag
  4. Dropped
  5. Evaluation: assigned correctly
  6. Evaluation: assigned incorrectly
  7. Sample solution: Correct solution

The height and width of the element are automatically adapted to the "Normal" state.