diff --git a/README.md b/README.md
index 2a58637..c316616 100644
--- a/README.md
+++ b/README.md
@@ -33,34 +33,52 @@ application:
 ```js
 const { Client, QuotaType } = require("reduct-js");
 
-// 1. Create a ReductStore client
-const client = new Client("http://127.0.0.1:8383", {
-  apiToken: "my-token",
-});
-
-// 2. Get or create a bucket with 1Gb quota
-const bucket = await client.getOrCreateBucket("my-bucket", {
-  quotaType: QuotaType.FIFO,
-  quotaSize: BigInt(1e9),
-});
-
-// 3. Write some data with timestamps in the 'sensor-1' entry
-const us = (dateString) => BigInt(Date.parse(dateString) * 1000);
-let record = await bucket.beginWrite("sensor-1", us("2021-01-01T00:00:00Z"));
-await record.write("Record #1");
-record = await bucket.beginWrite("sensor-1", us("2021-01-01T00:00:01Z"));
-await record.write("Record #2");
-
-// 4. Query the data by time range
-for await (const record of bucket.query(
-  "sensor-1",
-  us("2021-01-01T00:00:00Z"),
-  us("2021-01-01T00:00:02Z"),
-)) {
-  console.log(`Record timestamp: ${record.timestamp}`);
-  console.log(`Record size: ${record.size}`);
-  console.log(await record.readAsString());
-}
+const main = async () => {
+  // 1. Create a ReductStore client
+  const client = new Client("http://127.0.0.1:8383", {
+    apiToken: "my-token",
+  });
+
+  // 2. Get or create a bucket with 1Gb quota
+  const bucket = await client.getOrCreateBucket("my-bucket", {
+    quotaType: QuotaType.FIFO,
+    quotaSize: BigInt(1e9),
+  });
+
+  // 3. Write some data with timestamps and labels to the 'entry-1' entry
+  const us = (dateString) => BigInt(Date.parse(dateString) * 1000);
+  let record = await bucket.beginWrite("sensor-1", {
+    ts: us("2021-01-01T11:00:00Z"),
+    labels: {
+      score: 10,
+    },
+  });
+
+  await record.write("<Blob data>");
+  record = await bucket.beginWrite("sensor-1", {
+    ts: us("2021-01-01T11:00:01Z"),
+    labels: {
+      score: 20,
+    },
+  });
+  await record.write("<Blob data>");
+
+  // 4. Query the data by time range and condition
+  for await (const record of bucket.query(
+    "sensor-1",
+    us("2021-01-01T11:00:00Z"),
+    us("2021-01-01T11:00:02Z"),
+    {
+      when: { "&score": { $gt: 10 } },
+    },
+  )) {
+    console.log(`Record timestamp: ${record.time}`);
+    console.log(`Record size: ${record.size}`);
+    console.log(await record.readAsString());
+  }
+};
+
+main().then(() => console.log("done"));
 ```
 
 For more examples, see the [Guides](https://www.reduct.store/docs/guides) section in the ReductStore documentation.
diff --git a/examples/QuickStart.js b/examples/QuickStart.js
index b62e050..64dd7f9 100644
--- a/examples/QuickStart.js
+++ b/examples/QuickStart.js
@@ -12,20 +12,34 @@ const main = async () => {
     quotaSize: BigInt(1e9),
   });
 
-  // 3. Write some data with timestamps in the 'sensor-1' entry
+  // 3. Write some data with timestamps and labels to the 'entry-1' entry
   const us = (dateString) => BigInt(Date.parse(dateString) * 1000);
-  let record = await bucket.beginWrite("sensor-1", us("2021-01-01T00:00:00Z"));
-  await record.write("Record #1");
-  record = await bucket.beginWrite("sensor-1", us("2021-01-01T00:00:01Z"));
-  await record.write("Record #2");
+  let record = await bucket.beginWrite("sensor-1", {
+    ts: us("2021-01-01T11:00:00Z"),
+    labels: {
+      score: 10,
+    },
+  });
+
+  await record.write("<Blob data>");
+  record = await bucket.beginWrite("sensor-1", {
+    ts: us("2021-01-01T11:00:01Z"),
+    labels: {
+      score: 20,
+    },
+  });
+  await record.write("<Blob data>");
 
-  // 4. Query the data by time range
+  // 4. Query the data by time range and condition
   for await (const record of bucket.query(
     "sensor-1",
-    us("2021-01-01T00:00:00Z"),
-    us("2021-01-01T00:00:02Z"),
+    us("2021-01-01T11:00:00Z"),
+    us("2021-01-01T11:00:02Z"),
+    {
+      when: { "&score": { $gt: 10 } },
+    },
   )) {
-    console.log(`Record timestamp: ${record.timestamp}`);
+    console.log(`Record timestamp: ${record.time}`);
     console.log(`Record size: ${record.size}`);
     console.log(await record.readAsString());
   }