Update 'chr'

chr.md

@@ -9,16 +9,18 @@ El codi ascii del que volem obtindre el caracter.
 ### Exemple
 ```
 function init()
-    cls()
-    print(tostr(0),0,0)
-    print(tostr(8.4),0,1)
-    print(tostr(-65),0,2)
-    print(tostr(0xff),0,3)
+    setmode(2)
+end
 
-    print(0,0,5)
-    print(8.4,0,6)
-    print(-65,0,7)
-    print(0xff,0,8)
+function update()
+    cls()
+    for y=0,14 do
+        for x=0,19 do
+            locate(x,y)
+            color(rnd(16),rnd(16))
+            print(chr(rnd(256)))
+        end
+    end
 end
 ```
 ### Vore també