from ipyleaflet import Map, Heatmap
from random import uniform
import time

def create_random_data(length):
    "Return a list of some random lat/lon/value triples."
    return [[uniform(-80, 80), 
             uniform(-180, 180), 
             uniform(0, 1000)] for i in range(length)]

m = Map(center=[0, 0], zoom=2)
m

heat = Heatmap(locations=create_random_data(1000), radius=20, blur=10)
m.add_layer(heat)

for i in range(100):
    heat.locations = create_random_data(1000)
    time.sleep(0.1)

heat.radius = 30

heat.blur = 50

heat.max = 0.5

heat.gradient = {0.4: 'red', 0.6: 'yellow', 0.7: 'lime', 0.8: 'cyan', 1.0: 'blue'}

heat.locations = [[uniform(-80, 80), uniform(-180, 180), uniform(0, 1000)] for i in range(1000)]