Simpletimer.h and blynkesp8266.h can't read on arduino. I have put on library. please help me to solve

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    • Hardware model + communication type. For example: Arduino UNO with Ethernet Shield
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#define BLYNK_PRINT Serial
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#define USE_ARDUINO_INTERRUPTS true    // Set-up low-level interrupts for most acurate BPM math.
#include <PulseSensorPlayground.h>     // Includes the PulseSensorPlayground Library.