import tensorflow as tf

def create_model(input_shape=8):
    # neural network for binary classification
    model = tf.keras.Sequential([
        tf.keras.layers.Input(shape=(input_shape,)),
        tf.keras.layers.Dense(64, activation='relu'),
        tf.keras.layers.Dense(32, activation='relu'),
        tf.keras.layers.Dense(1, activation='sigmoid')
    ])
    model.compile(
        optimizer='adam',
        loss='binary_crossentropy',
        metrics=['accuracy']
    )
    return model