Loligo's interface is based on nodes. A node is a function unit that performs a certain operation, like drawing things to the screen, producing sound or doing some mathematics. Every node has inputs and/or outputs for sending information to or receiving information from other nodes.
In Loligo, there are only two different types of data that can flow between nodes: Numerical values (decimals within the range 0-1) and color values (32-bit RGBA). Connecting outputs to inputs of the other type will have them auto-converted. Colors on a number-input are converted to brightness values. Numbers on a color-input are interpreted as alpha-values.
You can manipulate the value of an input either by connecting it to an output or by setting a fixed value. Just click on it and play around with the slider.
The regular number input. There are two special input types based on it: Trigger and Switch.
Used by several nodes to set off certain events, like playing a single note. It fires each time the input signal crosses the red mark in the specified direction: From right to left, left to right or both.
The switch-input turns things on and off, or pauses/unpauses them, depending on whether the input value is within the black or white area.
Deals with color values..