import org.openrndr.application
import org.openrndr.extra.propertywatchers.watchingProperty

fun main() = application {
    program {
        val state = object {
            val x by watchingProperty(mouse::position) {
                it.x
            }

            val xx by watchingProperty(::x) {
                it * it
            }
        }

        extend {
            state.x
        }
    }
}