add option to change size

src/main.lua

@@ -140,7 +140,7 @@ local function newdesign()
                 end
                 write("Enter name: ")
                 local name = read()
-                if not fs.exists("designs/"..name) then
+                if not fs.exists("designs/"..name) or name == "" then
                     printError("Design not found!")
                 else
                     local file = fs.open("designs/"..name, "r")
@@ -151,6 +151,24 @@ local function newdesign()
                     buf = content["buf"]
                 end
             end
+            if action == 4 then -- change X size
+                reset()
+                write("Enter new X size: ")
+                local xsize = tonumber(read())
+                dimensions["x"] = xsize
+            end
+            if action == 5 then -- change floor amount
+                reset()
+                write("Enter new floor amount: ")
+                local ysize = tonumber(read())
+                dimensions["y"] = ysize
+            end
+            if action == 6 then -- change Z size
+                reset()
+                write("Enter new Z size: ")
+                local zsize = tonumber(read())
+                dimensions["z"] = zsize
+            end
         end
     end
 end