composition.js

function compose(firstFunction, secondFunction) { 
  return function(valueFromPassedInFunctions) {
    return firstFunction(secondFunction(valueFromPassedInFunctions))
  } 
}
  
function secondFunction(value) {
  return value.toLowerCase()
}

function firstFunction(value) {
  return value + " wooo"
}

var combineBothFunctions = compose(firstFunction, secondFunction)
combineBothFunctions("Lex")