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title "Stars";
newvar stars;
newvar spaces;
newvar rows;
newvar cols;

newvar x;
newvar y;

screenput "Please enter width: ";
screenin stars; screen;

if isnumeric(stars) = False then
 screenput "Please enter a number!";
 finish;
endif

if stars < 1 then
 screenput "Please enter a number!";
 finish;
endif

cols = stars;
spaces = 0;
screen;

for rows = 0 to stars;
 screen;
 for x = 0 to spaces;
  screenput " ";
 next x;
 for y = 0 to cols;
  screenput "* ";
 next y;
 spaces++;
 cols--;
next rows;

cols = 1;
spaces = spaces - 2;

for rows = 0 to stars - 1;
 screen;
 for x = 0 to spaces;
  screenput " ";
 next x;
 for y = 0 to cols;
  screenput "* ";
 next y;
 spaces--;
 cols++;
next rows;ò