Here is the idea
clc,clear
t = linspace(0,360,5)+45; % create angles
t = [t-2 t+2]; % add shifted angles
t1 = sort(t); % sorting
[x,y] = pol2cart(t1*pi/180,1); % convert to cartesian
x(x>0) = x(x>0) + 1; % move right part to right
x(x<0) = x(x<0) - 1; % move left part to left
% create surface
X = [x/10; x];
Y = [y/10; y];
Z = [x*0+1; x*0];
contour3(X,Y,Z,0:0.2:1)
surface(X,Y,Z)
view(45,45)
