//Sets the spawn structure at y 60
setSpawnStructure("under", 2)

//Creates a new LayerGenerator and saves it as a variable
layers = new LayerGenerator()

//Adds a layer of water from y 0 to y 60
layers.addLayer(1~90, <minecraft:water>)

//Adds a layer of water from y 2 to y 60
layers.addLayer(1~1, <minecraft:dirt>)

//Adds a layer of water from y 2 to y 60
layers.addLayer(0~0, <minecraft:bedrock>)

//Adds the layer generator to the dimension
addGenerator(layers)