add more stages to levels

levels/01_intro/01_output.json

@@ -4,12 +4,8 @@
 	"name": "Zero",
 	"description": "learn how to output data",
 	"init_board": "\n o \n\n I\n\n",
-	"stages": [
-		{
-			"input": [],
-			"output": [
-				0
-			]
-		}
-	]
+	"stages": [{
+		"input": [],
+		"output": [0]
+	}]
 }

levels/01_intro/05_copy_odd.json

@@ -4,6 +4,9 @@
 	"name": "Odd Cat",
 	"description": "copy only the odd numbers from the input",
 	"stages": [{
+		"input": [1, 2, 3, 4, 5, 6, 7],
+		"output": [1, 3, 5, 7]
+	},{
 		"input": [112, 92, 51, 79, 112, 96, 84, 59, 195, 208, 137, 196, 68, 204, 82, 148, 251, 56, 105, 38, 63, 204, 240, 220, 180, 54, 211, 17, 82, 17, 181, 43],
 		"output": [51, 79, 59, 195, 137, 251, 105, 63, 211, 17, 17, 181, 43]
 	}]