Setup project, only UI and basic code

The project setup contains README, LICENSE, the full UI and materials.
The PICO-8 side is wired up, but all the Arduino code is absent as
I need to figure out how to carve it out for the students.

Assets/BackgroundShader.shader

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+Shader "Custom/BackgroundShader"
+{
+    Properties
+    {
+        _Color ("Color", Color) = (0.2,0.5,0.4,1)
+        _MainTex ("Albedo (RGB)", 2D) = "white" {}
+        _Size ("Taille", Range(0,100)) = 75.0
+        _Speed ("Vitesse", Range(0,100)) = 20.0
+    }
+    SubShader
+    {
+        Pass
+        {
+            Tags { "Queue"="Background" "RenderType"="Background" "PreviewType"="Skybox" }
+            Cull Off
+            ZWrite Off
+
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+                float4 vertex : SV_POSITION;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            float4 _Color;
+            float _Size;
+            float _Speed;
+            
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+                UNITY_TRANSFER_FOG(o,o.vertex);
+                return o;
+            }
+            
+            fixed4 frag (v2f i) : SV_Target
+            {
+                // sample the texture
+                // fixed4 col = tex2D(_MainTex, i.uv);
+                // Offset enough so that the 0 crossing won't appear on large screens.
+                float time_step = (_Time[1]*_Speed) + 10000;
+                float4 fragColor;
+                float x = abs((-i.vertex.x + time_step) % _Size);
+                float y = abs((-i.vertex.y - time_step) % _Size);
+                if (( x <= _Size/2 && y <= _Size/2)
+                 || ( x > _Size/2 && y > _Size/2)) {
+                    fragColor = _Color;
+                } else {
+                    fragColor = _Color*0.8;
+                }
+                
+                return fragColor;
+            }
+            ENDCG
+        }
+    }
+    FallBack "Diffuse"
+}