Unable to split bar graph variables

I have the output that I need for a simple heads or tails program. What I tried to do was split up the two bar graphs but everytime I go to plot, it graphs it as one variable so I can't change colors of the two bar graphs or add a legend that says:

'Heads: [some color]'

'Tails: [a different color]'

Additionally, I can't seem to label the heads or tails bar graphs. I attached a .png file of the resulting graph.

% Using MATLAB, write a program to simulate a coin toss. 
% Your code will record tossing the coin 100 times (randomly). 
% Then, calculate the percentage of heads (or 1) and tails (or 0) generated by your random function. 
% Finally, create a bar chart to display the results.
% n = 100

N = 100; % number of trials
heads = 0; % instantiate heads variable
tails = 0; % instantiate tails variable
i = 0; % instatiate i variable to iterate N times

while i < N   
    coinToss = randi([0,1]); % -1 = tails, 1 = heads
    if coinToss == 0
        heads = heads + 1;
    elseif coinToss == 1
        tails = tails + 1;
    else
        disp('Error, invalid coin toss.')
    end    
    i = i + 1;
end

grid on;
title('Simulation of a Coin Toss where N = 100');
xlabel('Heads and Tails');
ylabel('Number of Coin Tosses');
y = [heads, tails];
bar(y);

Answer 1

[Srijith Kasaragod]

Following lines of code shows one possible solution to your problem. The bar graph is created against a categorical value on the x-axis. In that case, heads and tails would be plotted as two variables.

x=categorical({'Heads and Tails'}); 
y=[heads,tails]; 
bar(x,y); 
legend('Heads','Tails'); 

Refer 'bar' documentation for more information about specifying categorical data.