Custom instruction is a standalone sequence designed to perform a particular task and can be called from anywhere within the script of currently edited object.
Any instruction which does not return any value is called statement.
Any custom instruction consists of two parts - instruction definition and instruction call
Instruction definition
- Defines parameters and contents of custom instruction.
- It is standalone script block - does not snap with other blocks.
- To create new custom instruction, simply place new block anywhere in the canvas.
- Name and parameters of a instruction can be edited via context menu (right click on block).
- Parameters work as local variables and can be used inside the custom instruction.
- Custom instruction can be terminated at any point using return block.
Instruction call
- Executes the custom instruction, with defined parameters.
- Can be placed in any sequence as any other instruction.

Any Instruction which returns a value is called expression.
Expression definition work in same way as for statement instructions.
Instruction call has to be docked as input of another instruction as it would be a variable or literal.

Notes

Custom instructions of Global Storage are considered global and are available within the scope of whole game script.
Custom instructions of Entity Storage are considered member and are available within the scope of Storage Owner.
See also: *Return

Tile - Custom Function List – Ylands