Build a game that simulate the fluctuation of a stock price with a Structural Break

I need someone with whom I will stay in touch until the game will be perfect as I want. The coding worth no more than 50 euros. I'm paying 100 euros for people that will do the coding and then stay in touch with me. I need someone to be able to code on java a very simple game. Then it will need to be enter into qualtrics (I have an account in order to do so). The game is very easy. Why am I doing that. I am studying it for the purpose of a research. My aim is to analyse "After a Structural Break has been identified, are people more sensitive to fluctuation in the time series (fluctuation of a stock)?" I need you to do a game simulating the fluctuation of a stock price. 1) First the player will see 20 periods (a time series), from that he will analyse it and he will have to answer the 3 questions aside. I need a visual (a graph with in axis the price and period). 2) Then with the coding you will do the fluctuation will happen again for 4 periods. Then the player will have to answer the same 3 questions ( first question if he sees a structural break, second what he is forecast for the next fluctuation, third question the upper and lower bounds). 3) your coding will have to integrate the possibility of having a structural break during a period (means a big change) You will have to simulate this by changing the mean or the standard deviation of the time series. The aim of my study is to collect data, in order to answer a question: "After a Structural Break has been identified by people, are people more sensitive to fluctuation in the time series (Here in the stock price as the time series is representing the stock price of a derivative) - First part: step1 to 21 without any break, without providing forecast. Just seeing all the data points at once (not being generated 1 by 1) - Second part: continuation of the time series as before (same math model generating the numbers) The only difference is that from step 22 onwards we generate it step by step and we elicit forecasts from players for step 22, 26...(for every 4th step) - Third part: time series generated from model 2 as the structural break has occurred. The structural break occurs from the switch from the second to the third part. We elicit responses upto step 58 It could be that we build in another structural break e.g it could go back to model 1, after this structural break. But let's hold off on this. Let's get the basic model right.