Example CAL image sending actor

image_sender.cal

actor image_sender() String ACK_IN ==> int(size=9) IMAGE_OUT :

	List(type: int(size=9), size=9) image = [
		123, 222, 242,
		109,  13,   1,
		209, 224,  96
	];
	
	bool sent := false;

	action ==> IMAGE_OUT:[image] repeat 9
	guard sent = false
	do
		sent := true;
	end

	action ACK_IN:[ack] ==>
	do println("received acknowledgement: " + ack); end
	
end