particles setting

src/app/components/settings/settings.component.html

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+<div class="card">
+    <p-selectButton [options]="stateOptions" [(ngModel)]="value" (ngModelChange)="particlesChanged($event)"
+        optionLabel="label" optionValue="value"></p-selectButton>
+</div>

src/app/components/settings/settings.component.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { SettingsComponent } from './settings.component';
+
+describe('SettingsComponent', () => {
+  let component: SettingsComponent;
+  let fixture: ComponentFixture<SettingsComponent>;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      declarations: [SettingsComponent]
+    });
+    fixture = TestBed.createComponent(SettingsComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/settings/settings.component.ts

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+import { Component } from '@angular/core';
+
+import { LocalStorageService } from '../../services/local-storage.service';
+
+@Component({
+  selector: 'app-settings',
+  templateUrl: './settings.component.html',
+  styleUrls: ['./settings.component.scss']
+})
+export class SettingsComponent {
+
+  public stateOptions: any[] = [{ label: 'On', value: true }, { label: 'Off', value: false },];
+
+  public value: boolean = true;
+
+  constructor(private localStorageService: LocalStorageService) {
+    this.value = this.localStorageService.getParticles();
+  }
+
+  public particlesChanged(newVal: boolean) {
+    this.localStorageService.setParticles(newVal);
+    this.value = newVal;
+  }
+}