clear;
clc;
x=[-2.5 2.5 5 2.5 -2.5 -5];
y=[(5*sqrt(3))/2 (5*sqrt(3))/2 0 (-5*sqrt(3))/2 (-5*sqrt(3))/2 0];
% x1=[5 6 7];
% y1=[5 3 8];
fig1=figure;
set(fig1,'Color','g','Position',[100 100 500 500])
plot(x,y,'ks','MarkerSize',12,'MarkerFaceColor','k');

axis([-6 6 -6 6]);
axis off
text(-2.8,5.2,'\bf 1','fontsize',16)
text(2.2,5.2,'\bf 2','fontsize',16)
text(5.3,0,'\bf 3','fontsize',16)
text(2.2,-5.2,' \bf4','fontsize',16)
text(-2.8,-5.2,' \bf5','fontsize',16)
text(-5.8,0,'\bf 6','fontsize',16)
grid on;
hold on;
FirstPlayerLines=[];
SecondPlayerLines=[];
while 1    % if triangle
    disp('First player to draw a line')
    a1=input('player 1, first point ');
    a2=input('player 1, second point ');
    FirstPlayerLines=[FirstPlayerLines; a1 a2];
    plot([x(a1) x(a2)],[y(a1) y(a2)],'Color','r','LineWidth',3);
    waitforbuttonpress
    FirstPlayerLines
    disp('Second player to draw a line')
    b1=input('player 2, first point ');
    b2=input('player 2, second point ');
    SecondPlayerLines=[SecondPlayerLines; b1 b2];
    plot([x(b1) x(b2)],[y(b1) y(b2)],'Color','b','LineWidth',3);
    waitforbuttonpress
end