Matlab Slider- Display left right arrows and move slider every 1 second - matlab

Question

As the title says I am using the GUIDE toolbox in Matlab and I would firstly like to know how I can display the left/right arrows at either end of the slider?
Also how can I get the slider to automatically move every 1 second?
As far as I understand it I need to first create a timer object and set the execution mode and period as follows:
time = timer;
set(time,'executionMode','fixedRate','period',1);
Now I know I need to set the timerFcn to something like:
set(handles.slider1,'Value',x);
in order to change the position of the slider.
Also I understand I need to increment the x variable first by the slider step which in my case is 0.00520833. For example:
x = x + 0.00520833;
So I have some code as follows:
time = timer;
set(time,'executionMode','fixedRate','period',1);
time.timerFcn = set(handles.slider1,'Value', x = x + 0.00520833);
start(time);
However this doesn't work, and i'm sure it's because of something stupid that I am doing.
Thanks!
EDIT:
Now I can move the slider every second but what I would like to do is run a function of my own every second instead. For example:
time.timerFcn = #slider_increment;
function slider_increment
set(handles.slider1,'Value', get(handles.slider1,'Value') + 0.00520833)
slider = get(handles.slider1,'Value');
set(handles.text4,'String', slider);
I know this is a little messy but I will sort that later. The problem i'm facing is how to declare my own function inside the GUI script created by guide, and allow the function to access the handles to the GUI objects.

Answer 1

First, this
time.timerFcn = set(handles.slider1,'Value', x = x + 0.00520833);
Definitely produces an error...
I think you want something like this:
h = uicontrol;
time = timer;
set(time,'executionMode','fixedRate','period',1);
%Note: set(h,val,get(h,val) + change)
time.timerFcn = #(x,y)set(h,'position', get(h,'position') + 10);
start(time);