diff --git a/index.html b/index.html
index c1ffc3b..8bea410 100644
--- a/index.html
+++ b/index.html
@@ -17,12 +17,34 @@
 AFRAME.registerComponent('startfunctions', {
   init: function(){
 
-		let newEl = document.createElement('a-entity')
-		newEl.setAttribute('instruction-machine', '')
-		AFRAME.scenes[0].appendChild(newEl)
+	let newEl = document.createElement('a-entity')
+	newEl.setAttribute('instruction-machine', '')
+	AFRAME.scenes[0].appendChild(newEl)
+
+	let el = document.createElement('a-sphere')
+	el.setAttribute('radius', '.01')
+	el.setAttribute('target', '')
+	el.setAttribute('position', '0 1 -.5')
+	AFRAME.scenes[0].appendChild(el)
+	el.setAttribute("onpicked", "window.pfb = selectedElements.at(-1).element.getAttribute('position').clone();")
+	el.setAttribute("onreleased", "twoPosToBox(window.pfb, selectedElements.at(-1).element.getAttribute('position'));")
+	// event detail is available within that code as a e.detail e.g e.detail.element
   }
 })
 
+function twoPosToBox(A, B){
+	let center = A.clone()
+	center.add(B)
+	center.divideScalar(2)
+	let lengthes = A.clone()
+	lengthes.sub(B)
+	let el = document.createElement("a-box")
+	el.setAttribute("position", center )
+	el.setAttribute('target', '')
+	el.setAttribute("scale", lengthes.toArray().map( i => Math.abs(i) ).join(" ") )
+	AFRAME.scenes[0].appendChild(el)
+}
+
 // import from https://fabien.benetou.fr/PIMVRdata/SpaSca3DPrinterInstructions?action=source
 	// but as text editable format, not code
 		// would be safer to do few examples BEFORE synthesizing to a flexible enough format, just with mini games before
@@ -43,6 +65,20 @@ AFRAME.registerComponent('instruction-machine', {
 	// port a text version, i.e no 6DoF or hand tracking, to Monocle/Frame
 		// adapt from wiki sequential instructions part, possibly with some images
 	// consider https://threejs.org/docs/?q=grid#api/en/helpers/GridHelper too
+	// hiding panel, like whiteboards/blackboards in order to focus on solely the task at hand
+		// optional blinders managed by the user
+		// overall guiding principle, finding the sweet spot of signal/noise ratio
+			// starting with a lot of blinders then gradually removing them
+				// potentially leading to open a set of other instructions next to it
+					// and find combinatorial opportunities
+	// wall aligning before starting, this way snap would make sense too
+		// could be done via GridHelper rather than primitive
+	// requirement, i.e this instruction needs that other instruction to be completed before
+		// leading to a graph Sasha Kaurov (IAS) as discussed a while ago with X and experienced via Khan Academy (esp. in math)
+		// can also list optional requirements
+	// get model of space https://twitter.com/utopiah/status/1712340651453411808
+		// can prepare remotely, i.e in VR, to either train virtually in-situ
+		// to build the instruction sets
 
 
   schema: {default: 
diff --git a/jxr-core.js b/jxr-core.js
index ae229d6..bcb892a 100644
--- a/jxr-core.js
+++ b/jxr-core.js
@@ -218,6 +218,7 @@ AFRAME.registerComponent('onreleased', { // changed from ondrop to be coherent w
 			// if multi, should also look for onreleased__ not just onreleased
                         try {   
                                 eval( code ) // should be jxr too e.g if (txt.match(prefix)) interpretJXR(txt)
+				// note that event details are avaible within that code as e.detail which might not be very clear
                         } catch (error) {
                                 console.error(`Evaluation failed with ${error}`);
                         }
@@ -235,6 +236,7 @@ AFRAME.registerComponent('onpicked', {
 			// if multi, should also look for onreleased__ not just onreleased
                         try {   
                                 eval( code ) // should be jxr too e.g if (txt.match(prefix)) interpretJXR(txt)
+				// note that event details are avaible within that code as e.detail which might not be very clear
                         } catch (error) {
                                 console.error(`Evaluation failed with ${error}`);
                         }