diff --git a/src/lib/painter/lifecycle.ts b/src/lib/painter/lifecycle.ts
index a55a8fa..dd65069 100644
--- a/src/lib/painter/lifecycle.ts
+++ b/src/lib/painter/lifecycle.ts
@@ -1,20 +1,8 @@
 import { type CursorPos } from 'node:readline'
 import type { Either } from '../util/basic/either'
-import {
-  DoOption,
-  getOrElse,
-  none,
-  type Option,
-  some,
-} from '../util/basic/option'
-import { hasTag, pipe, type Tag } from '../util/basic/utility'
-import {
-  type CanvasEnd,
-  type CanvasOrigin,
-  cursorPos,
-  end,
-  origin,
-} from './canvas'
+import { none, type Option, some } from '../util/basic/option'
+import { type Tag } from '../util/basic/utility'
+import { type CanvasEnd, type CanvasOrigin, end, origin } from './canvas'
 
 interface PainterExit<E> extends Tag<'PainterExit'> {
   value: Either<E, Error>
@@ -67,51 +55,3 @@ export {
   type PainterTask,
   task,
 }
-
-//
-// testing
-//
-
-type TestEffect = (x: PainterTask<{message: Option<string>}>) => PainterTask<
-  {message: Option<string>}
->
-const testEffect: PainterEffect<{message: string, counter: number}> = x => {
-  const state = DoOption.start()
-    .bind('state', x.task.state)
-    .doL(ctx => {
-      console.log('Message:', ctx.state.message)
-      return some(undefined)
-    })
-    .doL(ctx => {
-      console.log('Counter:', ctx.state.counter)
-      return some(undefined)
-    })
-    .return(ctx =>
-      (ctx.state.counter < 100000)
-        ? {...ctx.state, counter: ctx.state.counter + 1}
-        : none
-    )
-  if (pipe(state, getOrElse(none), hasTag('None'))) return {_tag: 'PainterExit'}
-
-  return task(x.task.origin.value, x.task.end.value)(
-    x.task.effect,
-    getOrElse(none)(state),
-  )
-}
-
-const textTask = task<{message: string, counter: number}>(
-  cursorPos(2)(0),
-  cursorPos(4)(0),
-)(
-  testEffect,
-  {
-    _tag: 'PainterState',
-    message: 'test message',
-    counter: 1,
-  },
-)
-const testFn = (x: PainterTask | PainterExit) => {
-  return hasTag('PainterExit')(x) ? 'Exit' : testFn(x.task.effect(x))
-}
-
-testFn(textTask)