diff --git a/src/Components/Environment.tsx b/src/Components/Environment.tsx
index 9bd86ed..dc39d60 100644
--- a/src/Components/Environment.tsx
+++ b/src/Components/Environment.tsx
@@ -29,11 +29,13 @@ import {
 	Level,
 } from '../data/levels'
 import { ConditionValue } from '../utilities/blocks'
+import { countInstructions } from '../utilities/countInstructions'
 import {
 	InstructionBlock,
 	Instructions,
 } from '../utilities/decodeCodeInstructions'
 import type { EditorXml } from '../utilities/editorXml'
+import { runEnvironment } from '../utilities/runEnvironment'
 import styles from './Environment.module.css'
 
 export const Environment: FunctionComponent<{
@@ -131,6 +133,33 @@ const In: FunctionComponent<ComponentProps<typeof Environment>> = ({
 	})
 	const [elements, setElements] = useState(elementsWithIds)
 
+	useEffect(() => {
+		if (instructions === null) {
+			return
+		}
+		const runtime = runEnvironment(
+			completeFoundations,
+			elementsWithIds,
+			instructions.instructions,
+		)
+		while (instructions !== null) {
+			const { value, done } = runtime.next()
+			if (done) {
+				if (value.success) {
+					onSuccess(
+						instructions.xml,
+						value.performedNeedlessMove,
+						countInstructions(instructions.instructions),
+					)
+				} else {
+					onFail()
+				}
+				break
+			}
+			console.log('Yielded:', value)
+		}
+	}, [completeFoundations, elementsWithIds, instructions, onSuccess, onFail])
+
 	useEffect(() => {
 		if (isDoneRunningRef.current) {
 			return
@@ -179,18 +208,6 @@ const In: FunctionComponent<ComponentProps<typeof Environment>> = ({
 		const loop = (lastRunSuccess: null | boolean) => {
 			if (lastRunSuccess !== null) {
 				if (lastRunSuccess) {
-					const countInstructions = (
-						instructions: InstructionBlock[],
-					): number =>
-						instructions.reduce(
-							(count, instruction) =>
-								count +
-								1 +
-								('blocks' in instruction
-									? countInstructions(instruction.blocks)
-									: 0),
-							0,
-						)
 					const instructionsCount = countInstructions(instructions.instructions)
 					onSuccess(instructions.xml, performedNeedlessMove, instructionsCount)
 				} else {
diff --git a/src/utilities/countInstructions.ts b/src/utilities/countInstructions.ts
new file mode 100644
index 0000000..163f758
--- /dev/null
+++ b/src/utilities/countInstructions.ts
@@ -0,0 +1,10 @@
+import type { InstructionBlock } from './decodeCodeInstructions'
+
+export const countInstructions = (instructions: InstructionBlock[]): number =>
+	instructions.reduce(
+		(count, instruction) =>
+			count +
+			1 +
+			('blocks' in instruction ? countInstructions(instruction.blocks) : 0),
+		0,
+	)
diff --git a/src/utilities/runEnvironment.ts b/src/utilities/runEnvironment.ts
new file mode 100644
index 0000000..3c27792
--- /dev/null
+++ b/src/utilities/runEnvironment.ts
@@ -0,0 +1,50 @@
+import { EnvironmentFoundation, type EnvironmentElement } from '../data/levels'
+import type { Instructions } from './decodeCodeInstructions'
+
+export function* runEnvironment(
+	foundations: Array<Array<EnvironmentFoundation>>,
+	initialElements: Array<{
+		id: number
+		x: number
+		y: number
+		type: EnvironmentElement
+	}>,
+	instructions: Instructions,
+): Generator<
+	number /* @TODO*/,
+	| {
+			success: false
+	  }
+	| {
+			success: true
+			performedNeedlessMove: boolean
+	  },
+	void
+> {
+	let elements = [...initialElements]
+
+	const elementsAtPosition = (x: number, y: number) =>
+		elements
+			.filter((element) => element.x === x && element.y === y)
+			.map(({ type }) => type)
+	const removeElement = (x: number, y: number, type: EnvironmentElement) => {
+		elements = elements.filter(
+			(element) => element.x !== x || element.y !== y || element.type !== type,
+		)
+	}
+
+	yield 1
+	yield 2
+	yield 3
+	yield 4
+
+	if (Math.random() > 0) {
+		return {
+			success: false,
+		}
+	}
+	return {
+		success: true,
+		performedNeedlessMove: false,
+	}
+}