Psychtoolbox-Installation.md

 ## Description
 
-This manual should help you to successfully install **Psychtoolbox** in your MATLAB. This instructions are created mainly for Windows, but you can find details on installing Psychtoolbox also for other OS, please follow this [website](http://psychtoolbox.org/download.html)  
+This manual should help you to successfully install **Psychtoolbox** in your Matlab. This instructions are created mainly for Windows, but you can find details on installing Psychtoolbox also for other OS, please follow this [website](http://psychtoolbox.org/download.html)  
  
 
 ## Steps
 
-1. First open your MATLAB as administrator (right click on MATLAB launcher - *Run as administrator*)
+1. First open your Matlab as administrator (right click on MATLAB launcher - *Run as administrator*)
 2. Double check if you don't have the version already installed by entering following in the command window 
 ```matlab
 >> PsychtoolboxVersion
@@ -15,10 +15,65 @@ This manual should help you to successfully install **Psychtoolbox** in your MAT
 
 4. You need to install couple of things before Psychtoolbox itself:
 
-    - Download and install GStreamer [here](https://gstreamer.freedesktop.org/download/). Download the **MSVC** version, not MinGW. If there are some problems with the installation, check this [website](http://psychtoolbox.org/docs/GStreamer)   
-    - You'll also need to download Microsoft Runtime Libraries for MSVC 2015-2019 (you can find the link in section for windows installation in point 4., [here](http://psychtoolbox.org/download.html))  
-    - Importantly, download the Psychtoolbox installer, also the official website, in section for windows installation, point 2., [here](http://psychtoolbox.org/download.html)  
+    - Download and install **GStreamer** [here](https://gstreamer.freedesktop.org/download/). Download the **MSVC** version, not MinGW. If there are some problems with the installation, check this [website](http://psychtoolbox.org/docs/GStreamer)   
+    - You'll also need to download **Microsoft Runtime Libraries for MSVC 2015-2019** (you can find the link in section for windows installation in point 4., [here](http://psychtoolbox.org/download.html))  
+    - Importantly, download the Psychtoolbox installer, also the official website, in section for windows installation, point 2., [here](http://psychtoolbox.org/download.html). They advice to download it to your desktop, but I didn't and perhaps it's not so essential.  
 
+5. Go back to your Matlab, it should be still opened as administrator.  
+6. enter following:  
+
+```matlab
+>> cd('into the folder where you downloaded DownloadPsychtoolbox.m to').
+>> DownloadPsychtoolbox('C:\toolbox')
+```
+
+It's possible that at this point it already runs fine, it will just take a bit of time. If yes, then you just need to close and open Matlab again and verify if you have it installed by `PsychtoolboxVersion` command.   
+
+I have been asked if I want to delete the downloaded version, you can try to delete it first and if it's not working, you can choose not to. In that case you will be installing *beta* version. For me it works ok on the beta version.  
+
+ 
+
+In case you manage to download and install psychtoolbox, I suggest you to try running a basic demo from this [website](https://peterscarfe.com/totallyminimaldemo.html). I copied it below as well. In case you will have some synchronisation problems, just add at the beginning `Screen('Preference', 'SkipSyncTests', 1);`, otherwise copy this version. This should display a gray screen, that's it.  
+
+```matlab
+
+% Clear the workspace and the screen
+sca;
+close all;
+clearvars;
+
+% Here we call some default settings for setting up Psychtoolbox
+PsychDefaultSetup(2);
+
+% Get the screen numbers. This gives us a number for each of the screens
+% attached to our computer.
+screens = Screen('Screens');
+
+% To draw we select the maximum of these numbers. So in a situation where we
+% have two screens attached to our monitor we will draw to the external
+% screen.
+screenNumber = max(screens);
+
+% Define black and white (white will be 1 and black 0). This is because
+% in general luminace values are defined between 0 and 1 with 255 steps in
+% between. All values in Psychtoolbox are defined between 0 and 1
+white = WhiteIndex(screenNumber);
+black = BlackIndex(screenNumber);
+
+% Do a simply calculation to calculate the luminance value for grey. This
+% will be half the luminace values for white
+grey = white / 2;
+
+% Open an on screen window using PsychImaging and color it grey.
+[window, windowRect] = PsychImaging('OpenWindow', screenNumber, grey);
+
+% Now we have drawn to the screen we wait for a keyboard button press (any
+% key) to terminate the demo.
+KbStrokeWait;
+
+% Clear the screen.
+sca;
+```