diff --git a/src/lib/params.tsx b/src/lib/params.tsx
new file mode 100644
index 0000000..04b5e46
--- /dev/null
+++ b/src/lib/params.tsx
@@ -0,0 +1,128 @@
+import React, { ChangeEvent } from "react";
+
+
+type Validator<T> = {validate: (val: any) => T | undefined}
+
+interface Parameter<T> {
+    tryParseAndSet: (str: string) => boolean;
+    get value(): T;
+}
+
+export class Num implements Parameter<number> {
+    _value: number;
+
+    get value(): number {
+        return this._value;
+    }
+
+    tryParseAndSet = (str: string) => {
+        const newValue = parseFloat(str);
+        if (isNaN(newValue)) {
+            return false;
+        }
+        this._value = newValue;
+        return true;
+    }
+
+    validate = (val: any) => {
+        if (typeof val !== 'number') {
+            return undefined;
+        }
+        return val;
+    }
+}
+
+export class Str implements Parameter<string> {
+    _value: string;
+    get value(): string {
+        return this._value;
+    }
+    tryParseAndSet = (str: string) => {
+        this._value = str;
+        return true;
+    }
+    validate = (val: any) => {
+        if (typeof val !== 'string') {
+            return undefined;
+        }
+        return val;
+    }
+}
+
+export class Arr<V, T extends Validator<V>> implements Parameter<V[]> {
+    _value: V[];
+    _validator: T;
+    constructor(validator: T) {
+        this._validator = validator;
+    }
+    get value(): V[] {
+        return this._value;
+    }
+
+    tryParseAndSet = (str: string) => {
+        const json = JSON.parse(str);
+        const res = this.validate(json);
+        if (res === undefined) {
+            return false;
+        }
+        this._value = res;
+        return true;
+    }
+
+    validate = (val: any) => {
+        if (!Array.isArray(val)) {
+            return undefined;
+        }
+        return val.map(this._validator.validate).every(v => v !== undefined) ? val as V[] : undefined;
+    }
+}
+
+export type ParameterProps<T> = {
+    label: string,
+    value: Parameter<T>
+}
+
+export type State<T> = {
+    value: Parameter<T>,
+    error: boolean
+}
+
+export class ParameterComponent<T> extends React.Component<ParameterProps<T>, State<T>> {
+    label: string;
+    constructor(prop: ParameterProps<T>) {
+        super(prop);
+        this.label = prop.label;
+        this.state = {
+            value: prop.value,
+            error: false,
+        }
+    }
+
+    onChange(event: ChangeEvent<HTMLInputElement>) {
+        console.log(this)
+        try {
+            this.setState({
+                value: this.state.value,
+                error: !this.state.value.tryParseAndSet(event.target.value),
+            })
+        } catch {
+            this.setState({
+                value: this.state.value,
+                error: true,
+            })
+        }
+    }
+
+    render(): React.ReactNode {
+        return <div>{this.label}: <input onChange={(e) => this.onChange(e)}/> {this.state.error && "invalid value"}</div>
+    }
+        
+}
+
+// export const ParametersComponent = <T, >(object: Parameter<T>) => {
+//     return <input onChange={object.tryParseAndSet}></input>
+//     const c = new Arr(new Arr(new Num()))
+//     console.log(c)
+//     console.log(c.tryParseAndSet("[[1], [2], [3]]"))
+//     console.log(c)
+// }
\ No newline at end of file
diff --git a/src/visualizers/bubble-sort/start.tsx b/src/visualizers/bubble-sort/start.tsx
index 404b486..262ae98 100644
--- a/src/visualizers/bubble-sort/start.tsx
+++ b/src/visualizers/bubble-sort/start.tsx
@@ -1,3 +1,4 @@
+import { ParameterComponent, Num, Arr } from "../../lib/params"
 import { BubbleSortArguments } from "./bubble-sort"
 
 // type Props = {
@@ -5,8 +6,17 @@ import { BubbleSortArguments } from "./bubble-sort"
 // }
 
 export const BubbleSortStarter = ({ doStart }) => {
+    
+    const propArr = {
+        label: "массив",
+        value: new Arr<number, Num>(new Num())
+    }
+
+    const components = [<ParameterComponent<number[]> {...propArr} />].map((v) => <li>{v}</li>);
+
     return <div>
-        <button onClick={() => doStart([[5, 4, 3, 2, 1]], false)}>Start</button>
-        <button onClick={() => doStart([[5, 4, 3, 2, 1]], true)}>Run Full</button>
+        <ul>{components}</ul>
+        <button onClick={() => doStart([propArr.value.value], false)}>Start</button>
+        <button onClick={() => doStart([propArr.value.value], true)}>Run Full</button>
     </div>;
 }