- #sprite(3).visibility=1-sprite(3).visibility|Zandkreekdamm# (1960)
- #sprite(4).visibility=1-sprite(4).visibility|Veerse Gatdamm# (1961)
- #sprite(7).visibility=1-sprite(7).visibility|Grevelingendamm# en Philipsdamm (1967)
- #sprite(8).visibility=1-sprite(8).visibility|Volkerak# (1969)
- #sprite(6).visibility=1-sprite(6).visibility|Brouwersdamm# (1971)