function?[]?=?Login

%%?Creat?Figure
base_color?=?（rand（13）+rand（13））./2;
set（0‘units‘‘pixels‘）;
position?=?get（0‘screensize‘）;
height?=?150;
width?=?400;
cdata?=?generate_cdata（heightwidthbase_color）;

fig?=?figure（‘Name‘‘Login‘...
????‘Numbertitle‘‘off‘...
????‘Position‘[（position（3）/2）-（width/2）?（position（4）/2）-（height/2）?width?height]...
????‘Resize‘‘off‘...
????‘Menubar‘‘none‘）;
%%?Creat?Axes
axe?=?axes（‘Parent‘fig...
????‘Units‘‘pixels‘...
????‘Position‘[0?0?width?height]...
????‘Xcolor‘‘w‘...
????‘Ycolor‘‘w‘...
????‘FontSize‘12...
????‘Fontname‘‘Cambria‘...
????‘Xtick‘[]...
????‘Ytick‘[]）;

imshow（cdata）;

text（3040‘User?ID?????:?‘...
????‘FontSize‘12...
????‘Fontname‘‘Cambria‘...
????‘Color‘‘w‘）;

text（3080