- #sprite(3).visibility=1-sprite(3).visibility|Zandkreekdam# (1960)
- #sprite(4).visibility=1-sprite(4).visibility|Veerse Gatdam# (1961)
- #sprite(7).visibility=1-sprite(7).visibility|Grevelingendam# en Philipsdam (1967)
- #sprite(8).visibility=1-sprite(8).visibility|Volkerak# (1969)
- #sprite(6).visibility=1-sprite(6).visibility|Brouwersdam# (1971)