Fibonacci sequence problems, functions within functions

So, I'm trying to create the golden spiral from the fibonacci sequence from using functions within functions. I'm new to matlab so any help is appreciated. I was wondering what y'all thought about my program so far. There are problems with it and if anyone could help by inputting into matlab that would be appreciated! I need to define the angle of rotation still however. The final product will be a spiral expanding with a radius of fibonacci. Thanks for any input or help!

function[]=Spiral (N)
basic_arc    
    for i=1:N;
        [x]=(x*(fib (N)));
        [y]=(y*(fib (N)));
        Rotate(angle,x_shift,y_shift);
    end
Rotate(x,y,angle,x_shift,y_shift);
for i=3:4:N;
    x_shift=(-1)*fib (N);
    for j=5:4:N;
        x_shift=fib(N);
    end
end
for i=2:4:N;
    y_shift=fib(N);
    for j=4:4:N;
        y_shift=(-1)*fib (N);
    end
end
[x1] =(x+(x_shift));
[y1] =(y+(y_shift));
Rotate=[cosd(angle),sind(angle);-sind(angle),cosd(angle)];
xy=[x1;y1];
xynew=(Rotate)*xy;
x2=xynew(1,:);
y2=xynew(2,:);
plot(x2,y2)
function[x,y] = basic_arc
    for i=1:90
        x(i)=cosd(i);
        y(i)=sind(i);
    end
end
function []=fib (N)
fib(1)=1;
fib(2)=1;
    for i=3:N;
        fib(i)=fib(i-2)+fib(i-1);
    end
end
end