diff --git a/src/bot.rs b/src/bot.rs
index d1472e0..3071a21 100644
--- a/src/bot.rs
+++ b/src/bot.rs
@@ -27,6 +27,20 @@ loop{
 
 */
 
+//xdd
+mod simulation{
+	pub struct State{}
+	pub struct Instruction{}
+}
+mod instruction{
+	pub struct TimedInstruction<Instruction>{instruction:Instruction}
+}
+mod timeline{
+	pub struct Timeline<Instruction>{timeline:Vec<super::instruction::TimedInstruction<Instruction>>}
+}
+
+//serious code
+
 struct SegmentId(u64);
 
 pub struct Segment{
diff --git a/src/file.rs b/src/file.rs
index c25d2b2..0c2b4b9 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -55,3 +55,7 @@ pub struct BlockLayout{
 	count:u64,
 	location:Vec<u64>,
 }
+
+pub struct File{
+	//???
+}
diff --git a/src/map.rs b/src/map.rs
index e4fc21f..0cd0330 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -46,21 +46,35 @@ for model_id in 0..num_models{
 
 */
 
-struct Uuid(u128);
-struct BvhNodeId(u64);
+
+//xdd
+mod physics{
+	pub struct StyleModifiers{}
+}
+mod model{
+	pub struct IndexedModel{}
+	pub struct ModelInstance{}
+}
+mod image{
+	pub struct Image{}
+}
+
+//serious code
+
+struct ModelUuid(u128);
+struct ImageUuid(u128);
+pub struct BvhNodeId(u64);
 struct BvhNode{
 	//
 }
-enum Resource{
-	IndexedModel(model::IndexedModel),
-	Image(image::Image),//?
-}
 
 pub struct StreamableMap{
 	file:crate::file::File,
 	style:physics::StyleModifiers,//probably should move this out of physics
 	bvh:BvhNode,
-	resources:std::collections::HashMap<Uuid,Resource>,
+	//do not need this?  return only new data with load_node
+	resource_model:std::collections::HashMap<ModelUuid,model::IndexedModel>,
+	resource_image:std::collections::HashMap<ImageUuid,image::Image>,
 }
 impl StreamableMap{
 	pub fn load_node(&mut self,node_id:BvhNodeId)->Result<Vec<model::ModelInstance>,Error>{