add more stuff, also creating nice gif images

lua_programs/fibonacci.lua

@@ -0,0 +1,29 @@
+#! /usr/bin/lua5.3
+
+-- defines a factorial function
+function fact (n)
+  if n == 0 then
+    return 1
+  else
+    return n * fact(n-1)
+  end
+end
+
+function fibonacci (n)
+    a = 0
+    b = 1
+    i = 0
+    while i < n do
+        c = a+b
+        a = b
+        b = c
+        i = i+1
+    end
+
+    return b
+end
+
+print("enter a number:")
+a = io.read("*number")        -- read a number
+print(fibonacci(a))
+-- print(fact(a))