Design an App Mockup for a mobile phone app

I am building a typical mobile app for mobile phones only (no tablets - all design must be done for standard phone screens only). The app involves a service offered to owners of hospitality venues (restaurants, bars etc), so the audience of the app is independent small-business owners. I would like a designer to create a theme that i love for the app. For this purpose, i post here a small project that involves only a few introductory screens. The selected designer that comes up with a great theme, will then be hired for a lot of additional work on the rest of the app. Here are the screens i want to have designed at first. I am including the elements only here, the layout is up to the designer! 1. splash screen establishing the theme - assume that the app name is "Retailer" (we dont know the real name yet) 2. Login screen -username text field -password text field -login button -"don't have an account? sign up" link that takes you to screen 3 3. Signup screen -email text field -password1 -password2 -signup button In addition to the static screens, i'd like to see a sample of how run-time messages are shown to the user, for example what happens if in screen 2 the app must respond with an "incorrect user name" message, so please add 2.1 Login screen that includes an error message