Exporting data to Prometheus records data for 5 minutes in 15 seconds interval

[mmcrab10]

I am exploring the option to use open-telemetry to export metrics over to Prometheus and below is the sample code i ran in local to understand how data is exported.
Expected behavior : I would like to see one data point reported for the specific timestamp
Actual behavior : After executing this code and plotting a graph in grafana, i could see that the metrics are reported for a period of 5 minutes in 15 seconds interval.

Can someone help me understand why this happens?

exporter = PrometheusRemoteWriteMetricsExporter(
endpoint="https://endpoint.com/",
)
testing_labels = {"environment": "test"}
reader = PeriodicExportingMetricReader(exporter,30000)
provider = MeterProvider(metric_readers=[reader])
metrics.set_meter_provider(provider)
meter = metrics.get_meter(name)

def export_to_prometheus():
metric_one = meter.create_counter(name="metric_one",description="metric one")
metric_one.add(5,testing_labels)
metric_two = meter.create_histogram(name="metric_two")
metric_three = meter.create_up_down_counter(
name="metric_three",
description="metric three"
)
metric_two.record(17)
metric_three.add(56,testing_labels)

if name == "main":
export_to_prometheus(")