/* 
if we receive a true we toogle output
and store the new state in a local context 
with a unique name 
*/ 
var fname = "toggle1";

if(msg.payload === true){

if(context.get(fname) === false){
  msg.payload = true;  
}else{
  msg.payload = false;
}
context.set(fname, msg.payload);
}
return msg;